Add `.editorconfig`, consolidate `.gitattributes`

.editorconfig

@@ -0,0 +1,16 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[{*.py,SConstruct}]
+indent_style = space
+
+[*.{yml,yaml}]
+indent_size = 2
+indent_style = space

.gitattributes

@@ -1,6 +1,2 @@
-*.c eol=lf
-*.cpp eol=lf
-*.gd eol=lf
-*.tscn eol=lf
-*.cfg eol=lf
-*.godot eol=lf
+# Normalize EOL for all files that Git considers text files
+* text=auto eol=lf