fix: correct URLs, author name, and clean up stale hook

- Revert plugin/README/CONTRIBUTING URLs to git.jagfly.com (not on GitHub yet)
- Fix LICENSE copyright to Sheldon Finlay
- Remove leftover Stop hook from settings.local.json

.claude/settings.local.json

@@ -31,18 +31,5 @@
   },
   "enabledPlugins": {
     "agent-loop@agent-loop": true
-  },
-  "hooks": {
-    "Stop": [
-      {
-        "matcher": "",
-        "hooks": [
-          {
-            "type": "command",
-            "command": "kill -INT $PPID || true"
-          }
-        ]
-      }
-    ]
   }
 }