Add selectable ESP-NOW send path for accel/tap input.

Expose best_effort/fast/wait/reliable via UART, dashboard, and CLI so
loss vs latency can be compared under real multi-pod load.

Co-authored-by: Cursor <cursoragent@cursor.com>

main/esp_now_comm.h

@@ -13,6 +13,10 @@ esp_err_t esp_now_comm_init(const app_config_t *config);
 esp_err_t esp_now_comm_send_accel_stream(const uint8_t mac[CLIENT_MAC_LEN],
                                          uint32_t client_id, bool enable);
 
+/** Master: set accel/tap ESP-NOW send path on one slave (InputSendMode). */
+esp_err_t esp_now_comm_send_input_send_mode(const uint8_t mac[CLIENT_MAC_LEN],
+                                            uint32_t client_id, uint32_t mode);
+
 /** Master: configure tap notify flags on one slave. */
 esp_err_t esp_now_comm_send_tap_notify(const uint8_t mac[CLIENT_MAC_LEN],
                                        uint32_t client_id, bool single,