Rename plugin from "ralph-wiggum" to "ralph-loop"

Update all internal references to use "Ralph Loop" as the prominent name
Keep explanatory text noting it "implements the Ralph Wiggum technique"
Rename plugin directory from plugins/ralph-wiggum to plugins/ralph-loop
Update marketplace.json with new plugin name and source path
Update plugin-dev documentation references

.claude-plugin/marketplace.json

@@ -512,16 +512,6 @@
         "url": "https://github.com/pinecone-io/pinecone-claude-code-plugin.git"
       },
       "homepage": "https://github.com/pinecone-io/pinecone-claude-code-plugin"
-    },
-    {
-      "name": "superpowers",
-      "description": "Superpowers teaches Claude brainstorming, subagent driven development with built in code review, systematic debugging, and red/green TDD. Additionally, it teaches Claude how to author and test new skills.",
-      "category": "development",
-      "source": {
-        "source": "url",
-        "url": "https://github.com/obra/superpowers.git"
-      },
-      "homepage": "https://github.com/obra/superpowers"
     }
   ]
 }

.github/workflows/close-external-prs.yml

@@ -4,10 +4,6 @@ on:
   pull_request_target:
     types: [opened]
 
-permissions:
-  pull-requests: write
-  issues: write
-
 jobs:
   check-membership:
     if: vars.DISABLE_EXTERNAL_PR_CHECK != 'true'