docs: massive documentation overhaul + introduce Paige (Documentation Guide agent)

## 📚 Complete Documentation Restructure

**BMM Documentation Hub Created:**
- New centralized documentation system at `src/modules/bmm/docs/`
- 18 comprehensive guides organized by topic (7000+ lines total)
- Clear learning paths for greenfield, brownfield, and quick spec flows
- Professional technical writing standards throughout

**New Documentation:**
- `README.md` - Complete documentation hub with navigation
- `quick-start.md` - 15-minute getting started guide
- `agents-guide.md` - Comprehensive 12-agent reference (45 min read)
- `party-mode.md` - Multi-agent collaboration guide (20 min read)
- `scale-adaptive-system.md` - Deep dive on Levels 0-4 (42 min read)
- `brownfield-guide.md` - Existing codebase development (53 min read)
- `quick-spec-flow.md` - Rapid Level 0-1 development (26 min read)
- `workflows-analysis.md` - Phase 1 workflows (12 min read)
- `workflows-planning.md` - Phase 2 workflows (19 min read)
- `workflows-solutioning.md` - Phase 3 workflows (13 min read)
- `workflows-implementation.md` - Phase 4 workflows (33 min read)
- `workflows-testing.md` - Testing & QA workflows (29 min read)
- `workflow-architecture-reference.md` - Architecture workflow deep-dive
- `workflow-document-project-reference.md` - Document-project workflow reference
- `enterprise-agentic-development.md` - Team collaboration patterns
- `faq.md` - Comprehensive Q&A covering all topics
- `glossary.md` - Complete terminology reference
- `troubleshooting.md` - Common issues and solutions

**Documentation Improvements:**
- Removed all version/date footers (git handles versioning)
- Agent customization docs now include full rebuild process
- Cross-referenced links between all guides
- Reading time estimates for all major docs
- Consistent professional formatting and structure

**Consolidated & Streamlined:**
- Module README (`src/modules/bmm/README.md`) streamlined to lean signpost
- Root README polished with better hierarchy and clear CTAs
- Moved docs from root `docs/` to module-specific locations
- Better separation of user docs vs. developer reference

## 🤖 New Agent: Paige (Documentation Guide)

**Role:** Technical documentation specialist and information architect

**Expertise:**
- Professional technical writing standards
- Documentation structure and organization
- Information architecture and navigation
- User-focused content design
- Style guide enforcement

**Status:** Work in progress - Paige will evolve as documentation needs grow

**Integration:**
- Listed in agents-guide.md, glossary.md, FAQ
- Available for all phases (documentation is continuous)
- Can be customized like all BMM agents

## 🔧 Additional Changes

- Updated agent manifest with Paige
- Updated workflow manifest with new documentation workflows
- Fixed workflow-to-agent mappings across all guides
- Improved root README with clearer Quick Start section
- Better module structure explanations
- Enhanced community links with Discord channel names

**Total Impact:**
- 18 new/restructured documentation files
- 7000+ lines of professional technical documentation
- Complete navigation system with cross-references
- Clear learning paths for all user types
- Foundation for knowledge base (coming in beta)

Co-Authored-By: Claude <noreply@anthropic.com>

bmad/bmm/workflows/1-analysis/brainstorm-project/README.md

@@ -0,0 +1,113 @@
+# Project Brainstorming Workflow
+
+Structured ideation for software projects exploring problem spaces, architectures, and innovative solutions beyond traditional requirements gathering.
+
+## Table of Contents
+
+- [Purpose](#purpose)
+- [Usage](#usage)
+- [Process](#process)
+- [Inputs & Outputs](#inputs--outputs)
+- [Integration](#integration)
+
+## Purpose
+
+Generate multiple solution approaches for software projects through:
+
+- Parallel ideation tracks (architecture, UX, integration, value delivery)
+- Technical-business alignment from inception
+- Hidden assumption discovery
+- Innovation beyond obvious solutions
+
+## Usage
+
+```bash
+# Run brainstorming session
+bmad bmm *brainstorm-project
+
+# Or via Analyst agent
+*brainstorm-project
+```
+
+## Process
+
+### 1. Context Capture
+
+- Business objectives and constraints
+- Technical environment
+- Stakeholder needs
+- Success criteria
+
+### 2. Parallel Ideation
+
+- **Architecture Track**: Technical approaches with trade-offs
+- **UX Track**: Interface paradigms and user journeys
+- **Integration Track**: System connection patterns
+- **Value Track**: Feature prioritization and delivery
+
+### 3. Solution Synthesis
+
+- Evaluate feasibility and impact
+- Align with strategic objectives
+- Surface hidden assumptions
+- Generate recommendations
+
+## Inputs & Outputs
+
+### Inputs
+
+| Input             | Type     | Purpose                                       |
+| ----------------- | -------- | --------------------------------------------- |
+| Project Context   | Document | Business objectives, environment, constraints |
+| Problem Statement | Optional | Core challenge or opportunity                 |
+
+### Outputs
+
+| Output                   | Content                                     |
+| ------------------------ | ------------------------------------------- |
+| Architecture Proposals   | Multiple approaches with trade-off analysis |
+| Value Framework          | Prioritized features aligned to objectives  |
+| Risk Analysis            | Dependencies, challenges, opportunities     |
+| Strategic Recommendation | Synthesized direction with rationale        |
+
+## Integration
+
+### Workflow Chain
+
+1. **brainstorm-project** ← Current step
+2. research (optional deep dive)
+3. product-brief (strategic document)
+4. Phase 2 planning (PRD/tech-spec)
+
+### Feed Into
+
+- Product Brief development
+- Architecture decisions
+- PRD requirements
+- Epic prioritization
+
+## Best Practices
+
+1. **Prepare context** - Gather business and technical background
+2. **Think broadly** - Explore non-obvious approaches
+3. **Document assumptions** - Capture implicit beliefs
+4. **Consider constraints** - Technical, organizational, resource
+5. **Focus on value** - Align to business objectives
+
+## Configuration
+
+```yaml
+# bmad/bmm/config.yaml
+output_folder: ./output
+project_name: Your Project
+```
+
+## Related Workflows
+
+- [Research](../research/README.md) - Deep investigation
+- [Product Brief](../product-brief/README.md) - Strategic planning
+- [PRD](../../2-plan-workflows/prd/README.md) - Requirements document
+
+---
+
+Part of BMad Method v6 - Phase 1 Analysis workflows