Add Comet browser support

[janacm]

🌟 Add Comet Browser Support

This PR adds support for Comet browser to the Alfred Browser Tabs workflow.

✅ What's Included

🔧 Technical Implementation:

• Verified Comet browser uses Chromium API (tabs.title(), tabs.url(), activeTabIndex)
• Confirmed existing list-tabs.js and focus-tab.js scripts work perfectly with Comet
• No code changes required - Comet works with existing Chromium browser scripts
• Full compatibility with tab listing, focusing, and URL copying functionality

📚 Documentation Updates:

• Updated README.md to include Comet in supported browsers list
• Added comprehensive WARP.md with development guidance and architecture details
• Created ADDING_COMET_SUPPORT.md with step-by-step setup instructions for users
• Updated src/info.plist description and command list

🧪 Testing & Verification:

• Added test_comet.sh script for automated integration testing
• Manually verified: 7+ tabs detected across 2 windows
• Confirmed tab switching and URL clipboard copying works correctly
• Created COMET_INTEGRATION_SUMMARY.md with complete implementation details

🏗️ Browser Classification

Comet browser is classified as a Chromium browser alongside:

• Google Chrome, Brave Browser, Microsoft Edge, Vivaldi

This means it uses the same scripts without any modifications needed.

🎯 Usage

Once users follow the setup instructions, they can use:

• comet tabs - List all Comet browser tabs
• comet tabs github - Search for tabs containing "github"
• Hold CTRL while selecting to copy URL to clipboard

🚀 Impact

• Zero breaking changes - all existing functionality preserved
• No new dependencies - uses existing Chromium browser scripts
• Follows existing patterns - consistent with other browser implementations
• Well documented - comprehensive guides for users and developers

Ready to merge! 🎉