chore: prepare repository for Gitea publication

.gitignore

@@ -39,10 +39,15 @@ Thumbs.db
 
 # Credentials and environment — never committed
 .env
+.env.*
 *.env
 
 # Local, private reference material — never committed (see Docs/reference-notes-hollywood.md)
 /Art/reference/
+/Docs/data-inventory.md
+/Docs/environment.md
+/Docs/reference-notes-hollywood.md
+/.agents/skills/blender-skills/
 
 # Blender/Blosm working caches
 /Art/blender/.cache/