feat(projman): add RFC system for feature tracking

Implement wiki-based Request for Comments system for capturing,
reviewing, and tracking feature ideas through their lifecycle.

New commands:
- /rfc-create: Create RFC from conversation or clarified spec
- /rfc-list: List RFCs grouped by status
- /rfc-review: Submit Draft RFC for review
- /rfc-approve: Approve RFC for sprint planning
- /rfc-reject: Reject RFC with documented reason

RFC lifecycle: Draft → Review → Approved → Implementing → Implemented

Integration:
- /sprint-plan detects approved RFCs and offers selection
- /sprint-close updates RFC status on completion
- clarity-assist suggests /rfc-create for feature ideas

New MCP tool: allocate_rfc_number

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/projman/commands/rfc-review.md

@@ -0,0 +1,81 @@
+---
+description: Submit a Draft RFC for review, transitioning status to Review
+agent: planner
+---
+
+# Submit RFC for Review
+
+## Skills Required
+
+- skills/mcp-tools-reference.md
+- skills/rfc-workflow.md
+- skills/rfc-templates.md
+
+## Purpose
+
+Transition an RFC from Draft to Review status, indicating it's ready for maintainer evaluation. Optionally assign a champion to shepherd the RFC through review.
+
+## Invocation
+
+Run `/rfc-review <number>` where number is the RFC number:
+- `/rfc-review 0001`
+- `/rfc-review 1` (leading zeros optional)
+
+## Workflow
+
+1. **Validate RFC Number**
+   - Normalize input (add leading zeros if needed)
+   - Fetch RFC page: `RFC-NNNN: *`
+
+2. **Check Current Status**
+   - Parse frontmatter to get current status
+   - **STOP** if status is not "Draft"
+   - Error: "RFC-NNNN is in [status] status. Only Draft RFCs can be submitted for review."
+
+3. **Validate Minimum Content**
+   - Check for Summary section (required)
+   - Check for Motivation section (required)
+   - Check for Detailed Design > Overview (required)
+   - Warn if Alternatives Considered is empty
+
+4. **Optional: Assign Champion**
+   - Ask: "Would you like to assign a champion? (Enter username or skip)"
+   - Champion is responsible for driving the RFC through review
+
+5. **Update RFC Page**
+   - Change status: Draft → Review
+   - Update "Updated" date
+   - Set Champion if provided
+   - Add Review Notes section if not present
+
+6. **Update RFC-Index**
+   - Remove entry from "## Draft" section
+   - Add entry to "## In Review" section
+
+7. **Confirm Transition**
+   - Display updated status
+   - Note next steps (review discussion, then /rfc-approve or /rfc-reject)
+
+## Visual Output
+
+```
++----------------------------------------------------------------------+
+|  PROJMAN - RFC Review Submission                                     |
++----------------------------------------------------------------------+
+
+RFC-0005: Feature Idea submitted for review
+
+Status: Draft → Review
+Champion: @assigned_user (or: unassigned)
+Updated: RFC-Index
+
+Next steps:
+- Discuss in RFC wiki page comments or meetings
+- When decision reached: /rfc-approve 0005 or /rfc-reject 0005
+```
+
+## Validation Errors
+
+- **RFC not found**: "RFC-NNNN not found. Check the number with /rfc-list"
+- **Wrong status**: "RFC-NNNN is [status]. Only Draft RFCs can be reviewed."
+- **Missing sections**: "RFC-NNNN is missing required sections: [list]. Please complete before review."