Add BMA456 tap detection with ESP-NOW notify and host snapshot API.

Slaves forward configured tap kinds to the master; goTool exposes CLI, dashboard, REST, and WebSocket with separate notify vs receive and 2s display cache.

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

main/powerpod.c

@@ -3,6 +3,8 @@
 #include "cmd_accel_deadzone.h"
 #include "cmd_accel_snapshot.h"
 #include "cmd_accel_stream.h"
+#include "cmd_tap_notify.h"
+#include "cmd_tap_snapshot.h"
 #include "cmd_espnow_unicast_test.h"
 #include "cmd_espnow_find_me.h"
 #include "cmd_restart.h"
@@ -182,6 +184,8 @@ void app_main(void) {
     cmd_accel_deadzone_register();
     cmd_accel_snapshot_register();
     cmd_accel_stream_register();
+    cmd_tap_notify_register();
+    cmd_tap_snapshot_register();
     cmd_espnow_unicast_test_register();
     cmd_espnow_find_me_register();
     cmd_restart_register();