chore: skip deploy for agent instructions and planning file changes

Adds paths-ignore for AGENTS.md, CLAUDE.md, and .docs-plan/** so pushes
that only touch agent workflow instructions or planning artifacts don't
trigger a redundant IC deployment.

Author: marc0olo

.github/workflows/deploy-ic.yml

@@ -3,6 +3,10 @@ name: Deploy to Internet Computer
 on:
   push:
     branches: [main]
+    paths-ignore:
+      - 'AGENTS.md'
+      - 'CLAUDE.md'
+      - '.docs-plan/**'
   workflow_dispatch:
 
 concurrency: