refactor(skills): adapt baoyu-comic for Hermes

Port the upstream baoyu-comic skill to Hermes' tool ecosystem, matching
the earlier baoyu-infographic adaptation:

- metadata namespace openclaw -> hermes (+ tags, homepage)
- drop EXTEND.md preferences system (references/config/ removed,
  workflow Step 1.1 removed)
- user prompts via clarify (one question at a time) instead of
  AskUserQuestion batches
- image generation via image_generate instead of baoyu-imagine, with
  aspect-ratio mapping to landscape/portrait/square
- Windows/PowerShell/WSL shell snippets dropped
- file I/O referenced via Hermes write_file/read_file tools
- CLI-style --flags converted to natural-language options and
  user-intent cues (skill matching has no slash command trigger)

Add PORT_NOTES.md documenting the adaptations and a sync procedure.
Art-style/tone/layout reference files are preserved verbatim from
upstream v1.56.1.

skills/creative/baoyu-comic/references/auto-selection.md

@@ -66,7 +66,6 @@ Art Style × Tone combinations work best when matched appropriately:
 
 ## Priority Order
 
-1. User-specified options (`--art`, `--tone`, `--style`)
-2. EXTEND.md defaults
-3. Content signal analysis → auto-selection
-4. Fallback: ligne-claire + neutral + standard
+1. User-specified options (art / tone / style)
+2. Content signal analysis → auto-selection
+3. Fallback: ligne-claire + neutral + standard