refactor: Major v6 epic creation improvements and documentation overhaul

## Key Changes

### 1. Epic Creation Workflow Enhancements
- Added user-value focused epic structure principles (NO technical layer breakdown)
- Implemented multi-mode detection: CONTINUE, REPLACE, or UPDATE existing epics
- Added comprehensive anti-pattern examples showing wrong vs right epic breakdown
- Epics now created AFTER architecture for technically-informed story breakdown
- Added checkpoint protocol for interactive workflow progression

### 2. Removed Deprecated Solutioning Gate Check
- Deleted entire solutioning-gate-check workflow (682 lines)
- Replaced by new implementation-readiness workflow
- Cleaner separation of concerns in solutioning phase

### 3. PRD Template Simplification
- Removed hardcoded "Implementation Planning", "References", and "Next Steps" sections
- PRD now focuses purely on requirements, not workflow orchestration
- Epics/stories created as separate step after architecture

### 4. Documentation Overhaul (15+ docs updated)
- Updated quick-start guide with v6 workflow sequence
- Clarified that epics are created AFTER architecture, not during PRD
- Updated solutioning docs to reflect implementation-readiness pattern
- Improved agents-guide, brownfield-guide, enterprise docs
- Enhanced glossary, FAQ, and workflow reference documentation

### 5. Workflow Path Adjustments
- All 4 paths updated (enterprise/method × brownfield/greenfield)
- Version bumps across BMGD, BMM, and CIS workflow YAMLs
- Minor instruction file updates for consistency

### Files Changed
- 65 files total: 468 insertions, 978 deletions (net reduction of 510 lines)
- 4 files deleted (entire solutioning-gate-check workflow)
- 1 new directory added (implementation-readiness placeholder)

src/modules/bmm/docs/brownfield-guide.md

@@ -291,9 +291,10 @@ See the [Workflows section in BMM README](../README.md) for details.
 
 **BMad Method/Enterprise:** Use `prd` workflow
 
-- Creates PRD.md + epic breakdown
+- Creates PRD.md with FRs/NFRs only
 - References existing architecture
 - Plans integration points
+- Epics+Stories created AFTER architecture phase
 
 **Brownfield-specific:** See [Scale Adaptive System](./scale-adaptive-system.md) for complete workflow paths by track.
 
@@ -309,7 +310,8 @@ See the [Workflows section in BMM README](../README.md) for details.
 **Workflows:**
 
 - `create-architecture` - Extend architecture docs (BMad Method/Enterprise)
-- `solutioning-gate-check` - Validate before implementation (BMad Method/Enterprise)
+- `create-epics-and-stories` - Create epics and stories AFTER architecture
+- `implementation-readiness` - Validate before implementation (BMad Method/Enterprise)
 
 ### Phase 4: Implementation (All Tracks)
 
@@ -473,8 +475,8 @@ Document in tech-spec/architecture:
 
 1. **Document:** Run `document-project` (Deep scan) - Critical for understanding existing UI patterns
 2. **Analyze:** Load Analyst → `research` (if evaluating analytics libraries)
-3. **Plan:** Load PM → `prd`
-4. **Solution:** Load Architect → `create-architecture` → `solutioning-gate-check`
+3. **Plan:** Load PM → `prd` (creates FRs/NFRs)
+4. **Solution:** Load Architect → `create-architecture` → `create-epics-and-stories` → `implementation-readiness`
 5. **Implement:** Sprint-based (10-15 stories)
    - Load SM → `sprint-planning`
    - Per epic: `epic-tech-context` → stories
@@ -495,10 +497,11 @@ Document in tech-spec/architecture:
 
 1. **Document:** Run `document-project` (Exhaustive if not documented) - **Mandatory**
 2. **Analyze:** Load Analyst → `research` (WebSocket vs WebRTC vs CRDT)
-3. **Plan:** Load PM → `prd`
+3. **Plan:** Load PM → `prd` (creates FRs/NFRs)
 4. **Solution:**
    - Load Architect → `create-architecture` (extend for real-time layer)
-   - Load Architect → `solutioning-gate-check`
+   - Load Architect → `create-epics-and-stories`
+   - Load Architect → `implementation-readiness`
 5. **Implement:** Sprint-based (20-30 stories)
 
 **Time:** 3-6 weeks
@@ -518,13 +521,14 @@ Document in tech-spec/architecture:
    - `brainstorm-project` - Explore multi-tenancy approaches
    - `research` - Database sharding, tenant isolation, pricing
    - `product-brief` - Strategic document
-3. **Plan:** Load PM → `prd` (comprehensive)
+3. **Plan:** Load PM → `prd` (comprehensive FRs/NFRs)
 4. **Solution:**
    - `create-architecture` - Full system architecture
    - `integration-planning` - Phased migration strategy
    - `create-architecture` - Multi-tenancy architecture
    - `validate-architecture` - External review
-   - `solutioning-gate-check` - Executive approval
+   - `create-epics-and-stories` - Create epics and stories
+   - `implementation-readiness` - Executive approval
 5. **Implement:** Phased sprint-based (50+ stories)
 
 **Time:** 3-6 months
@@ -634,7 +638,8 @@ prd                     # BMad Method/Enterprise tracks
 # Phase 3: Solutioning (BMad Method/Enterprise)
 # Architect agent:
 create-architecture          # Extend architecture
-solutioning-gate-check       # Final validation
+create-epics-and-stories     # Create epics and stories (after architecture)
+implementation-readiness       # Final validation
 
 # Phase 4: Implementation (All Tracks)
 # SM agent:
@@ -668,8 +673,11 @@ correct-course               # If issues
 **Phase 2 Planning:**
 
 - `docs/tech-spec.md` (Quick Flow track)
-- `docs/PRD.md` (BMad Method/Enterprise tracks)
-- Epic breakdown
+- `docs/PRD.md` (BMad Method/Enterprise tracks - FRs/NFRs only)
+
+**Phase 3 Solutioning:**
+
+- Epic breakdown (created after architecture)
 
 **Phase 3 Architecture:**