chore: release v5.5.0

- RFC System for Feature Tracking
- 5 new commands: /rfc-create, /rfc-list, /rfc-review, /rfc-approve, /rfc-reject
- New MCP tool: allocate_rfc_number
- Sprint integration: /sprint-plan detects approved RFCs
- Clarity-assist integration: feature request detection

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

.claude-plugin/marketplace.json

@@ -6,7 +6,7 @@
   },
   "metadata": {
     "description": "Project management plugins with Gitea and NetBox integrations",
-    "version": "5.4.1"
+    "version": "5.5.0"
   },
   "plugins": [
     {