Update .gitignore for Godot 4

From:
https://github.com/github/gitignore/blob/6eeebe6f49678aacd8311ce079842c971b3ebe96/Godot.gitignore

Need to add the .godot folder since it's full of cooked assets.

We also now include *.import files as recommended in the docs:
https://docs.godotengine.org/en/4.3/tutorials/assets_pipeline/import_process.html#files-generated

Author: idbrii

.gitignore

@@ -1,12 +1,18 @@
+# Godot 4+ specific ignores
+.godot/
 
 # Godot-specific ignores
 .import/
-*.import
 export.cfg
-*.TMP
+export_presets.cfg
+
+# Imported translations (automatically generated from CSV files)
+*.translation
 
 # Mono-specific ignores
 .mono/
+data_*/
+mono_crash.*.json
 
 # Other
 demo.txt