Rename `legible_unique_name` param to `force_readable_name`

With the introduction of Scene Unique Nodes, `is_unique_in_owner`, "Unique Name in Scene" and other descriptions related to the feature, the second parameter of add_child() and add_simbling() could be misunderstood to be related, at first glance.

doc/classes/Node.xml

@@ -121,11 +121,11 @@
 		<method name="add_child">
 			<return type="void" />
 			<param index="0" name="node" type="Node" />
-			<param index="1" name="legible_unique_name" type="bool" default="false" />
+			<param index="1" name="force_readable_name" type="bool" default="false" />
 			<param index="2" name="internal" type="int" enum="Node.InternalMode" default="0" />
 			<description>
-				Adds a child node. Nodes can have any number of children, but every child must have a unique name. Child nodes are automatically deleted when the parent node is deleted, so an entire scene can be removed by deleting its topmost node.
-				If [param legible_unique_name] is [code]true[/code], the child node will have a human-readable name based on the name of the node being instantiated instead of its type.
+				Adds a child [param node]. Nodes can have any number of children, but every child must have a unique name. Child nodes are automatically deleted when the parent node is deleted, so an entire scene can be removed by deleting its topmost node.
+				If [param force_readable_name] is [code]true[/code], improves the readability of the added [param node]. If not named, the [param node] is renamed to its type, and if it shares [member name] with a sibling, a number is suffixed more appropriately. This operation is very slow. As such, it is recommended leaving this to [code]false[/code], which assigns a dummy name featuring [code]@[/code] in both situations.
 				If [param internal] is different than [constant INTERNAL_MODE_DISABLED], the child will be added as internal node. Such nodes are ignored by methods like [method get_children], unless their parameter [code]include_internal[/code] is [code]true[/code].The intended usage is to hide the internal nodes from the user, so the user won't accidentally delete or modify them. Used by some GUI nodes, e.g. [ColorPicker]. See [enum InternalMode] for available modes.
 				[b]Note:[/b] If the child node already has a parent, the function will fail. Use [method remove_child] first to remove the node from its current parent. For example:
 				[codeblocks]
@@ -151,10 +151,10 @@
 		<method name="add_sibling">
 			<return type="void" />
 			<param index="0" name="sibling" type="Node" />
-			<param index="1" name="legible_unique_name" type="bool" default="false" />
+			<param index="1" name="force_readable_name" type="bool" default="false" />
 			<description>
 				Adds a [param sibling] node to current's node parent, at the same level as that node, right below it.
-				If [param legible_unique_name] is [code]true[/code], the child node will have a human-readable name based on the name of the node being instantiated instead of its type.
+				If [param force_readable_name] is [code]true[/code], improves the readability of the added [param sibling]. If not named, the [param sibling] is renamed to its type, and if it shares [member name] with a sibling, a number is suffixed more appropriately. This operation is very slow. As such, it is recommended leaving this to [code]false[/code], which assigns a dummy name featuring [code]@[/code] in both situations.
 				Use [method add_child] instead of this method if you don't need the child node to be added below a specific node in the list of children.
 				[b]Note:[/b] If this node is internal, the new sibling will be internal too (see [code]internal[/code] parameter in [method add_child]).
 			</description>

scene/main/node.cpp

@@ -1131,7 +1131,7 @@ void Node::_add_child_nocheck(Node *p_child, const StringName &p_name) {
 	add_child_notify(p_child);
 }
 
-void Node::add_child(Node *p_child, bool p_legible_unique_name, InternalMode p_internal) {
+void Node::add_child(Node *p_child, bool p_force_readable_name, InternalMode p_internal) {
 	ERR_FAIL_NULL(p_child);
 	ERR_FAIL_COND_MSG(p_child == this, vformat("Can't add child '%s' to itself.", p_child->get_name())); // adding to itself!
 	ERR_FAIL_COND_MSG(p_child->data.parent, vformat("Can't add child '%s' to '%s', already has a parent '%s'.", p_child->get_name(), get_name(), p_child->data.parent->get_name())); //Fail if node has a parent
@@ -1140,7 +1140,7 @@ void Node::add_child(Node *p_child, bool p_legible_unique_name, InternalMode p_i
 #endif
 	ERR_FAIL_COND_MSG(data.blocked > 0, "Parent node is busy setting up children, add_node() failed. Consider using call_deferred(\"add_child\", child) instead.");
 
-	_validate_child_name(p_child, p_legible_unique_name);
+	_validate_child_name(p_child, p_force_readable_name);
 	_add_child_nocheck(p_child, p_child->data.name);
 
 	if (p_internal == INTERNAL_MODE_FRONT) {
@@ -1154,7 +1154,7 @@ void Node::add_child(Node *p_child, bool p_legible_unique_name, InternalMode p_i
 	}
 }
 
-void Node::add_sibling(Node *p_sibling, bool p_legible_unique_name) {
+void Node::add_sibling(Node *p_sibling, bool p_force_readable_name) {
 	ERR_FAIL_NULL(p_sibling);
 	ERR_FAIL_NULL(data.parent);
 	ERR_FAIL_COND_MSG(p_sibling == this, vformat("Can't add sibling '%s' to itself.", p_sibling->get_name())); // adding to itself!
@@ -1167,7 +1167,7 @@ void Node::add_sibling(Node *p_sibling, bool p_legible_unique_name) {
 		internal = INTERNAL_MODE_BACK;
 	}
 
-	data.parent->add_child(p_sibling, p_legible_unique_name, internal);
+	data.parent->add_child(p_sibling, p_force_readable_name, internal);
 	data.parent->_move_child(p_sibling, get_index() + 1);
 }
 
@@ -2787,11 +2787,11 @@ void Node::_bind_methods() {
 	GLOBAL_DEF("editor/node_naming/name_casing", NAME_CASING_PASCAL_CASE);
 	ProjectSettings::get_singleton()->set_custom_property_info("editor/node_naming/name_casing", PropertyInfo(Variant::INT, "editor/node_naming/name_casing", PROPERTY_HINT_ENUM, "PascalCase,camelCase,snake_case"));
 
-	ClassDB::bind_method(D_METHOD("add_sibling", "sibling", "legible_unique_name"), &Node::add_sibling, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("add_sibling", "sibling", "force_readable_name"), &Node::add_sibling, DEFVAL(false));
 
 	ClassDB::bind_method(D_METHOD("set_name", "name"), &Node::set_name);
 	ClassDB::bind_method(D_METHOD("get_name"), &Node::get_name);
-	ClassDB::bind_method(D_METHOD("add_child", "node", "legible_unique_name", "internal"), &Node::add_child, DEFVAL(false), DEFVAL(0));
+	ClassDB::bind_method(D_METHOD("add_child", "node", "force_readable_name", "internal"), &Node::add_child, DEFVAL(false), DEFVAL(0));
 	ClassDB::bind_method(D_METHOD("remove_child", "node"), &Node::remove_child);
 	ClassDB::bind_method(D_METHOD("get_child_count", "include_internal"), &Node::get_child_count, DEFVAL(false)); // Note that the default value bound for include_internal is false, while the method is declared with true. This is because internal nodes are irrelevant for GDSCript.
 	ClassDB::bind_method(D_METHOD("get_children", "include_internal"), &Node::_get_children, DEFVAL(false));

scene/main/node.h

@@ -303,8 +303,8 @@ public:
 	StringName get_name() const;
 	void set_name(const String &p_name);
 
-	void add_child(Node *p_child, bool p_legible_unique_name = false, InternalMode p_internal = INTERNAL_MODE_DISABLED);
-	void add_sibling(Node *p_sibling, bool p_legible_unique_name = false);
+	void add_child(Node *p_child, bool p_force_readable_name = false, InternalMode p_internal = INTERNAL_MODE_DISABLED);
+	void add_sibling(Node *p_sibling, bool p_force_readable_name = false);
 	void remove_child(Node *p_child);
 
 	int get_child_count(bool p_include_internal = true) const;