chore(skills): touchdesigner-mcp follow-ups

- Remove orphan skills/creative/touchdesigner/references/pitfalls.md
  left over from the rename commit (git add-then-edit instead of git mv
  meant the old file never got deleted).
- Honour $HERMES_HOME in setup.sh and SKILL.md setup invocation so
  profile-aware installs work correctly.
- Fix troubleshooting.md config path to use $HERMES_HOME instead of
  hardcoding ~/.hermes/.
- Add touchdesigner-mcp entries to skills-catalog.md and
  optional-skills-catalog.md for parity with blender-mcp/meme-generation.

website/docs/reference/skills-catalog.md

@@ -296,6 +296,7 @@ hermes skills install official/<category>/<skill>
 |-------|-------------|------|
 | `blender-mcp` | Control Blender directly from Hermes via socket connection to the blender-mcp addon. Create 3D objects, materials, animations, and run arbitrary Blender Python (bpy) code. | `creative/blender-mcp` |
 | `meme-generation` | Generate real meme images by picking a template and overlaying text with Pillow. Produces actual .png meme files. | `creative/meme-generation` |
+| `touchdesigner-mcp` | Control a running TouchDesigner instance via the twozero MCP plugin — create operators, set parameters, wire connections, execute Python, build real-time audio-reactive visuals and GLSL networks. 36 native tools. | `creative/touchdesigner-mcp` |
 
 ## devops