feat: Implement ESP32-C6 UART driver with basic send/receive functionality and unit tests

docs/plans/2026-07-05-ballu-ac-esp32c6-controller-implementation.md

@@ -23,13 +23,13 @@ Implementation of ESP32-C6 based AC controller that bridges Zigbee (Home Assista
 ## Implementation Steps
 
 ### Task 1: ESP32-C6 Hardware Setup and Basic UART
-- [ ] Configure ESP32-C6 UART pins (TX/RX) for MideaUART communication
-- [ ] Initialize UART driver at 9600 baud 8N1
-- [ ] Implement basic UART send/receive functionality
-- [ ] Create UART abstraction layer with timeout handling
-- [ ] Write unit tests for UART driver (success/failure scenarios)
-- [ ] Run tests - must pass before next task
-- [ ] Update Readme.md
+- [x] Configure ESP32-C6 UART pins (TX/RX) for MideaUART communication
+- [x] Initialize UART driver at 9600 baud 8N1
+- [x] Implement basic UART send/receive functionality
+- [x] Create UART abstraction layer with timeout handling
+- [x] Write unit tests for UART driver (success/failure scenarios)
+- [x] Run tests - must pass before next task
+- [x] Update Readme.md
 
 ### Task 2: MideaUART Protocol Implementation
 - [ ] Implement Control structure for MideaUART commands