feat: enhance QA agent as senior developer with code review capabilities and major brownfield improvements

This release introduces significant enhancements across multiple areas:

QA Agent Transformation:
- Transform QA agent into senior developer role with active code refactoring abilities
- Add review-story task enabling QA to review, refactor, and improve code directly
- Integrate QA review step into standard development workflow (SM → Dev → QA)
- QA can fix small issues directly and leave checklist for remaining items
- Updated dev agent to maintain File List for QA review focus

Knowledge Base Improvements:
- Add extensive brownfield development documentation and best practices
- Clarify Web UI vs IDE usage with cost optimization strategies
- Document PRD-first approach for large codebases/monorepos
- Add comprehensive expansion packs explanation
- Update IDE workflow to include QA review step
- Clarify agent usage (bmad-master vs specialized agents)

Brownfield Enhancements:
- Create comprehensive Working in the Brownfield guide
- Add document-project task to analyst agent capabilities
- Implement PRD-first workflow option for focused documentation
- Transform document-project to create practical brownfield architecture docs
- Document technical debt, workarounds, and real-world constraints
- Reference actual files instead of duplicating content
- Add impact analysis when PRD is provided

Documentation Task Improvements:
- Simplify to always create ONE unified architecture document
- Add deep codebase analysis phase with targeted questions
- Focus on documenting reality including technical debt
- Include Quick Reference section with key file paths
- Add practical sections: useful commands, debugging tips, known issues

Workflow Updates:
- Update all 6 workflow files with detailed IDE transition instructions
- Add clear SM → Dev → QA → Dev cycle explanation
- Emphasize Gemini Web for brownfield analysis (1M+ context advantage)
- Support both PRD-first and document-first approaches

This release significantly improves the brownfield development experience and introduces a powerful shift-left QA approach with senior developer mentoring.

bmad-core/workflows/brownfield-fullstack.yml

@@ -42,7 +42,42 @@ workflow:
 
     - workflow_end:
       action: move_to_ide
-      notes: "All planning artifacts complete. Move to IDE environment to begin development. Explain to the user the IDE Development Workflow next steps: data#bmad-kb:IDE Development Workflow"
+      notes: |
+        Planning phase complete! Now transition to IDE Development:
+        
+        1. ENSURE DOCUMENTS ARE IN PROJECT:
+           - Copy final prd.md to project's docs/prd.md
+           - Copy final architecture.md to project's docs/architecture.md
+           - All documents must be in the project before proceeding
+        
+        2. SHARD DOCUMENTS (in IDE):
+           - Option A: Use PO agent to shard: @po then ask to shard docs/prd.md
+           - Option B: Manual: Drag shard-doc task + docs/prd.md into chat
+           - This creates docs/prd/ and docs/architecture/ folders with sharded content
+        
+        3. START DEVELOPMENT CYCLE:
+           a. SM Agent (New Chat): @sm → *create
+              - Creates next story from sharded docs
+              - Review and approve story (Draft → Approved)
+           
+           b. Dev Agent (New Chat): @dev
+              - Implements approved story
+              - Updates File List with all changes
+              - Marks story as "Review" when complete
+           
+           c. QA Agent (New Chat): @qa → review-story
+              - Senior dev review with refactoring ability
+              - Fixes small issues directly
+              - Leaves checklist for remaining items
+              - Updates story status (Review → Done or stays Review)
+           
+           d. If QA left unchecked items:
+              - Dev Agent (New Chat): Address remaining items
+              - Return to QA for final approval
+        
+        4. REPEAT: Continue cycle for all epic stories
+        
+        Reference: data#bmad-kb:IDE Development Workflow
 
   flow_diagram: |
     ```mermaid