chore(ci): skip build workflow for non-code changes

Skip linting, building, and testing when only non-code files change:
- Documentation (*.md, docs/)
- Assets (assets/, schemas/)
- GitHub templates (.github/ISSUE_TEMPLATE/)
- IDE/editor config (.idea/, .claude/)
- Git config (.gitignore)
- Commit lint config (.commitlintrc.yml, package.json, package-lock.json)
- LICENSE

Commit and PR title linting still runs via commit-lint.yml.

Author: CalvinAllen

.github/workflows/build.yml

@@ -3,8 +3,34 @@ name: Build & Test
 on:
   push:
     branches: [ main ]
+    paths-ignore:
+      - '**.md'
+      - 'docs/**'
+      - 'assets/**'
+      - 'schemas/**'
+      - '.github/ISSUE_TEMPLATE/**'
+      - '.idea/**'
+      - '.claude/**'
+      - '.gitignore'
+      - '.commitlintrc.yml'
+      - 'package.json'
+      - 'package-lock.json'
+      - 'LICENSE'
   pull_request:
     branches: [ main ]
+    paths-ignore:
+      - '**.md'
+      - 'docs/**'
+      - 'assets/**'
+      - 'schemas/**'
+      - '.github/ISSUE_TEMPLATE/**'
+      - '.idea/**'
+      - '.claude/**'
+      - '.gitignore'
+      - '.commitlintrc.yml'
+      - 'package.json'
+      - 'package-lock.json'
+      - 'LICENSE'
 
 permissions:
   contents: read