chore: release v2.0.0

- Remove Roadmap section from README (no longer representative)
- Update all version references to 2.0.0
- marketplace.json: 2.0.0
- projman plugin: 2.0.0
- Update documentation version references

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

.claude-plugin/marketplace.json

@@ -1,6 +1,6 @@
 {
   "name": "bandit-claude-marketplace",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "Project management plugins with Gitea and NetBox integrations",
   "owner": {
     "name": "Bandit Labs",
@@ -9,7 +9,7 @@
   "plugins": [
     {
       "name": "projman",
-      "version": "1.0.0",
+      "version": "2.0.0",
       "description": "Sprint planning and project management with Gitea integration",
       "source": "./plugins/projman"
     },