Enable manual workflow dispatch for CI testing

Added workflow_dispatch trigger to allow manual CI runs via GitHub CLI.

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

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

Author: vishr

.github/workflows/test.yaml

@@ -7,6 +7,7 @@ on:
   pull_request:
     branches:
       - master
+  workflow_dispatch:
 
 jobs:
   test: