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.

optional-skills/creative/touchdesigner-mcp/scripts/setup.sh

@@ -8,7 +8,8 @@ OK="${GREEN}✔${NC}"; FAIL="${RED}✘${NC}"; WARN="${YELLOW}⚠${NC}"
 
 TWOZERO_URL="https://www.404zero.com/pisang/twozero.tox"
 TOX_PATH="$HOME/Downloads/twozero.tox"
-HERMES_CFG="$HOME/.hermes/config.yaml"
+HERMES_HOME_DIR="${HERMES_HOME:-$HOME/.hermes}"
+HERMES_CFG="${HERMES_HOME_DIR}/config.yaml"
 MCP_PORT=40404
 MCP_ENDPOINT="http://localhost:${MCP_PORT}/mcp"