ci: skip CI on documentation-only changes

Add paths-ignore for markdown files, LICENSE, .gitignore, and docs/.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Kosthi

.github/workflows/ci.yml

@@ -3,8 +3,22 @@ name: CI
 on:
   push:
     branches: [master]
+    paths-ignore:
+      - "**.md"
+      - "CLAUDE.md"
+      - "**/CLAUDE.md"
+      - "LICENSE"
+      - ".gitignore"
+      - "docs/**"
   pull_request:
     branches: [master]
+    paths-ignore:
+      - "**.md"
+      - "CLAUDE.md"
+      - "**/CLAUDE.md"
+      - "LICENSE"
+      - ".gitignore"
+      - "docs/**"
 
 permissions:
   contents: read