GitHub Browser for KOReader v0.2

• Added Dispatcher integration for Gesture shortcut support.
• Fixed FileChooser crash on certain device firmwares when importing tokens.
• Added manual text input fallback for token import.
• Removed curl dependency; plugin is now 100% pure Lua using native socket.http.
• Polished README and UI formatting.

Full Changelog: v0.1...v0.2