Feature Request: Implement Binance and TopstepX Platform Adapters

Goal

Now that the multi-platform adapter architecture has been introduced and Dhan support is fully functional, we should implement full integrations for Binance and TopstepX embedded charts.

Current Status

• Skeletons are already scaffolded inside src/platforms/BinancePlatform.ts and src/platforms/TopstepXPlatform.ts as stubs.
• They are currently disabled in src/main.ts's detectPlatform() and matches are excluded from browser manifests to avoid injecting inactive content scripts.

Steps to Complete Integrations

1. Selector Auditing: Inspect the DOM structure of TradingView charts embedded on Binance (binance.com/en/trade/*) and TopstepX (topstepx.com) inside their respective iframe contexts.
2. Implement PlatformAdapter Methods:
   • getCurrentTimeframe() / getTimeframeContainer()
   • getLineColorButton() / isColorMenuOpen() / getColorSwatches()
   • isClickOnDrawingToolbar() / isFloatingToolbarNode()
3. Activation:
   • Uncomment detection rules inside detectPlatform() in src/main.ts.
   • Add target origin patterns to the content_scripts.matches array in browser manifests (platform/*/manifest.json).