v2.2.0 — Widget Screenshots & CI Fix

What's New

• Added widget screenshots to README showing Light theme, Dark theme, and Settings panel
• New screenshot gallery visible directly on the GitHub repo page

Bug Fixes

• Fixed CI workflow failing with 'No jobs were run' on regular pushes
• Fixed YAML parsing error in release pipeline by extracting validation to standalone script
• Workflow now validates QML/JS syntax on every push, builds releases only on tags

Improvements

• Version bumped to 2.2.0