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/analysis-framework.md

@@ -147,7 +147,7 @@ title: "Alan Turing: The Father of Computing"
 topic: alan-turing-biography
 time_span: 1912-1954
 source_language: en
-user_language: zh  # From EXTEND.md or detected
+user_language: zh  # User-specified or detected from conversation
 aspect_ratio: "3:4"
 recommended_page_count: 16
 recommended_art: ligne-claire  # ligne-claire|manga|realistic|ink-brush|chalk
@@ -161,7 +161,7 @@ recommended_layout: mixed      # standard|cinematic|dense|splash|mixed|webtoon
 | Field | Description |
 |-------|-------------|
 | `source_language` | Detected language of source content |
-| `user_language` | Output language for comic (from EXTEND.md > --lang > source_language) |
+| `user_language` | Output language for comic (user-specified option > conversation language > source_language) |
 
 ## Analysis Checklist