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/workflows/1-analysis/research/instructions-deep-prompt.md

@@ -14,6 +14,7 @@
 <critical>Add explicit instructions: "If you cannot find reliable data, state 'No verified data found for [X]'"</critical>
 <critical>Require confidence indicators in prompts: "Mark each claim with confidence level and source quality"</critical>
 <critical>Include fact-checking instructions: "Distinguish between verified facts, analysis, and speculation"</critical>
+<critical>⚠️ CHECKPOINT PROTOCOL: After EVERY <template-output> tag, you MUST follow workflow.xml substep 2c: SAVE content to file immediately → SHOW checkpoint separator (━━━━━━━━━━━━━━━━━━━━━━━) → DISPLAY generated content → PRESENT options [a]Advanced Elicitation/[c]Continue/[p]Party-Mode/[y]YOLO → WAIT for user response. Never batch saves or skip checkpoints.</critical>
 
 <workflow>
 

src/modules/bmm/workflows/1-analysis/research/instructions-market.md

@@ -17,6 +17,7 @@
 <critical>Clearly label: FACT (sourced data), ANALYSIS (your interpretation), PROJECTION (forecast/speculation)</critical>
 <critical>After each WebSearch, extract and store source URLs - include them in the report</critical>
 <critical>If a claim seems suspicious or too convenient, STOP and cross-verify with additional searches</critical>
+<critical>⚠️ CHECKPOINT PROTOCOL: After EVERY <template-output> tag, you MUST follow workflow.xml substep 2c: SAVE content to file immediately → SHOW checkpoint separator (━━━━━━━━━━━━━━━━━━━━━━━) → DISPLAY generated content → PRESENT options [a]Advanced Elicitation/[c]Continue/[p]Party-Mode/[y]YOLO → WAIT for user response. Never batch saves or skip checkpoints.</critical>
 
 <!-- IDE-INJECT-POINT: market-research-subagents -->
 

src/modules/bmm/workflows/1-analysis/research/instructions-router.md

@@ -13,6 +13,7 @@
 <critical>Flag any data you are uncertain about with confidence levels: [High Confidence], [Medium Confidence], [Low Confidence - verify]</critical>
 <critical>Distinguish clearly between: FACTS (from sources), ANALYSIS (your interpretation), and SPECULATION (educated guesses)</critical>
 <critical>When using WebSearch results, ALWAYS extract and include the source URL for every claim</critical>
+<critical>⚠️ CHECKPOINT PROTOCOL: After EVERY <template-output> tag, you MUST follow workflow.xml substep 2c: SAVE content to file immediately → SHOW checkpoint separator (━━━━━━━━━━━━━━━━━━━━━━━) → DISPLAY generated content → PRESENT options [a]Advanced Elicitation/[c]Continue/[p]Party-Mode/[y]YOLO → WAIT for user response. Never batch saves or skip checkpoints.</critical>
 
 <!-- IDE-INJECT-POINT: research-subagents -->
 

src/modules/bmm/workflows/1-analysis/research/instructions-technical.md

@@ -18,6 +18,7 @@
 <critical>Distinguish: FACT (from official docs/sources), OPINION (from community/reviews), SPECULATION (your analysis)</critical>
 <critical>If you cannot find current information about a technology, state: "I could not find recent {{current_year}} data on [X]"</critical>
 <critical>Extract and include source URLs in all technology profiles and comparisons</critical>
+<critical>⚠️ CHECKPOINT PROTOCOL: After EVERY <template-output> tag, you MUST follow workflow.xml substep 2c: SAVE content to file immediately → SHOW checkpoint separator (━━━━━━━━━━━━━━━━━━━━━━━) → DISPLAY generated content → PRESENT options [a]Advanced Elicitation/[c]Continue/[p]Party-Mode/[y]YOLO → WAIT for user response. Never batch saves or skip checkpoints.</critical>
 
 <workflow>