refactor: rename feature-dev to do workflow

- Rename skills/feature-dev/ → skills/do/
- Update config.json module name and paths
- Shorter command: /do instead of /feature-dev
- State file: .claude/do.local.md
- Completion promise: <promise>DO_COMPLETE</promise>

Generated with SWE-Agent.ai

Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>

config.json

@@ -169,15 +169,15 @@
         }
       ]
     },
-    "feature-dev": {
+    "do": {
       "enabled": false,
       "description": "7-phase feature development workflow with codeagent orchestration",
       "operations": [
         {
           "type": "copy_dir",
-          "source": "skills/feature-dev",
-          "target": "skills/feature-dev",
-          "description": "Install feature-dev skill with hooks"
+          "source": "skills/do",
+          "target": "skills/do",
+          "description": "Install do skill with hooks"
         }
       ]
     },