Install the Blender skills pack locally and keep it out of git

.gitignore

@@ -58,6 +58,10 @@ assets/models/generated/npc_base_*_normal.png
 
 # Local AppImage extraction
 squashfs-root/
+
+# Local agent skills (installed per machine from the Blender Skills Pack; not part of
+# the game, tests or release artifacts, and never shipped)
+.agents/
 # Blender asset library: per-asset Cycles renders are local review output (the
 # committed review artefacts are docs/blender_previews/sheet_*.jpg), and Godot
 # extracts the GLB-embedded textures next to the models on import.