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/templates/premise-brief-tmpl.yaml

@@ -0,0 +1,77 @@
+---
+template:
+  id: premise-brief-tmpl
+  name: Premise Brief
+  version: 1.0
+  description: One-page document expanding a 1-sentence idea into a paragraph with stakes
+  output:
+    format: markdown
+    filename: "{{title}}-premise.md"
+
+workflow:
+  elicitation: true
+  allow_skip: false
+
+sections:
+  - id: one_sentence
+    title: One-Sentence Summary
+    instruction: |
+      Create a compelling one-sentence summary that captures:
+      - The protagonist
+      - The central conflict
+      - The stakes
+      Example: "When [inciting incident], [protagonist] must [goal] or else [stakes]."
+    elicit: true
+
+  - id: expanded_paragraph
+    title: Expanded Paragraph
+    instruction: |
+      Expand the premise into a full paragraph (5-7 sentences) including:
+      - Setup and world context
+      - Protagonist introduction
+      - Inciting incident
+      - Central conflict
+      - Stakes and urgency
+      - Hint at resolution path
+    elicit: true
+
+  - id: protagonist
+    title: Protagonist Profile
+    instruction: |
+      Define the main character:
+      - Name and role
+      - Core desire/goal
+      - Internal conflict
+      - What makes them unique
+      - Why readers will care
+    elicit: true
+
+  - id: antagonist
+    title: Antagonist/Opposition
+    instruction: |
+      Define the opposing force:
+      - Nature of opposition (person, society, nature, self)
+      - Antagonist's goal
+      - Why they oppose protagonist
+      - Their power/advantage
+    elicit: true
+
+  - id: stakes
+    title: Stakes
+    instruction: |
+      Clarify what's at risk:
+      - Personal stakes for protagonist
+      - Broader implications
+      - Ticking clock element
+      - Consequences of failure
+    elicit: true
+
+  - id: unique_hook
+    title: Unique Hook
+    instruction: |
+      What makes this story special:
+      - Fresh angle or twist
+      - Unique world element
+      - Unexpected character aspect
+      - Genre-blending elements
+    elicit: true