Update GitHub Actions to use development branch

Changed:
- tests.yml: Run on 'development' instead of 'dev'
- Triggers on push to: main, development
- Triggers on PRs to: main, development

This ensures:
✅ All PRs to development run tests
✅ Pushes to development run tests
✅ Branch protection can require 'Tests' check
✅ CI works with new two-branch workflow

Related: Two-branch workflow setup

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.github/workflows/tests.yml

@@ -2,9 +2,9 @@ name: Tests
 
 on:
   push:
-    branches: [ main, dev ]
+    branches: [ main, development ]
   pull_request:
-    branches: [ main, dev ]
+    branches: [ main, development ]
 
 jobs:
   test: