Update code order with static annotation on gdscript_styleguide.rst (#8920)

* Update code order with static annotation on gdscript_styleguide.rst

Update code order on gdscript_styleguide.rst
by inserting static variables and methods on the code order as a proposal

tutorials/scripting/gdscript/gdscript_styleguide.rst

@@ -763,27 +763,38 @@ We suggest to organize GDScript code this way:
 
 ::
 
-    01. @tool
-    02. @icon
-    03. class_name
-    04. extends
-    05. ## docstring
-
-    06. signals
-    07. enums
-    08. constants
+    01. @tool, @icon, @static_unload
+    02. class_name
+    03. extends
+    04. ## doc comment
+
+    05. signals
+    06. enums
+    07. constants
+    08. static variables
     09. @export variables
-    10. public variables
-    11. private variables
-    12. @onready variables
-
-    13. optional built-in virtual _init method
-    14. optional built-in virtual _enter_tree() method
-    15. built-in virtual _ready method
-    16. remaining built-in virtual methods
-    17. public methods
-    18. private methods
-    19. subclasses
+    10. remaining regular variables
+    11. @onready variables
+
+    12. _static_init()
+    13. remaining static methods
+    14. overridden built-in virtual methods:
+        1. _init()
+        2. _enter_tree() 
+        3. _ready()
+        4. _process()
+        5. _physics_process()
+        6. remaining virtual methods
+    15. overridden custom methods
+    16. remaining methods
+    17. subclasses
+
+And put the class methods and variables in the following order depending on their access modifiers:
+
+::
+   
+    1. public
+    2. private
 
 We optimized the order to make it easy to read the code from top to bottom, to
 help developers reading the code for the first time understand how it works, and