Add utility to clean the godot editor state

This is going to make git 100 times easier

util/clear_editor_state.py

@@ -0,0 +1,23 @@
+#!/usr/bin/python3
+from pathlib import Path
+
+# Current working directory
+cwd = Path.cwd()
+
+for path in cwd.glob('**/*.tscn'):
+    result = []
+
+    with path.open() as f:
+        for line in f.readlines():
+            if line.startswith('_sections_unfolded'):
+                # Skip lines that start with _sections_unfolded
+                continue
+            elif line.startswith('[node') and 'parent=' not in line:
+                # Root node, remove 'index="0"'
+                result.append(line.replace(' index="0"', ''))
+            else:
+                # Add line as is
+                result.append(line)
+
+    with path.open('w') as f:
+        f.writelines(result)