Add Creative Writing expansion pack (#414)

* Add Creative Writing expansion pack
- 10 specialized writing agents for fiction and narrative design
- 8 complete workflows (novel, screenplay, short story, series)
- 27 quality checklists for genre and technical validation
- 22 writing tasks covering full creative process
- 8 professional templates for structured writing
- KDP publishing integration support

* Fix bmad-creative-writing expansion pack formatting and structure

- Convert all agents to standard BMAD markdown format with embedded YAML
- Add missing core dependencies (create-doc, advanced-elicitation, execute-checklist)
- Add bmad-kb.md customized for creative writing context
- Fix agent dependency references to only include existing files
- Standardize agent command syntax and activation instructions
- Clean up agent dependencies for beta-reader, dialog-specialist, editor, genre-specialist, narrative-designer, and world-builder

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Co-authored-by: Brian <bmadcode@gmail.com>

expansion-packs/bmad-creative-writing/checklists/character-consistency-checklist.md

@@ -0,0 +1,16 @@
+# ------------------------------------------------------------
+# 1. Character Consistency Checklist
+# ------------------------------------------------------------
+---
+checklist:
+  id: character-consistency-checklist
+  name: Character Consistency Checklist
+  description: Verify character details and voice remain consistent throughout the manuscript.
+items:
+  - "[ ] Names spelled consistently (incl. diacritics)"
+  - "[ ] Physical descriptors match across chapters"
+  - "[ ] Goals and motivations do not contradict earlier scenes"
+  - "[ ] Character voice (speech patterns, vocabulary) is uniform"
+  - "[ ] Relationships and histories align with timeline"
+  - "[ ] Internal conflict/arc progression is logical"
+...