Update project configuration files and improve save menu functionality. Added editorconfig settings for various file types, enhanced .gitattributes for text and binary file handling, expanded .gitignore for build and local settings, and modified save_menu.gd to maintain focus on UI elements after refresh.

.editorconfig

@@ -2,3 +2,23 @@ root = true
 
 [*]
 charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# GDScript требует табов для отступов.
+[*.{gd,gdshader}]
+indent_style = tab
+indent_size = 4
+
+# Сцены и ресурсы Godot редактирует сам — не трогаем пробелы.
+[*.{tscn,tres,godot,import,uid}]
+trim_trailing_whitespace = false
+insert_final_newline = false
+
+[*.{md,yml,yaml,json}]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false