Added camera-related sdkconfig options to esp32s3-korvo2-v3 and kevin-sp-v4-dev config.json files. Updated esp32s3_korvo2_v3_board.cc to implement button actions for WiFi config and chat state toggling. Refactored kevin-sp-v4_board.cc to unify I2C bus usage for codec and camera, and adjusted SCCB initialization logic.