Add verified Joy-Con 2 USB bridge with native mouse support

Implement the standalone USB protocol probe and Bluetooth-backed right Joy-Con bridge with its own persistent virtual pairing identity. Preserve complete ordered native reports, including opaque motion data, and match the console feature set. Relay built-in vibration cues only after genuine source acknowledgement and expose safe BOOTSEL pairing control. Include native capture diagnostics and focused protocol, packet-lifecycle, and cue regressions. Native mouse operation confirmed on Switch with bridge 0.24; private captures and firmware backups remain outside the commit.

tools/switch2_usb_probe/memory.h

@@ -0,0 +1,7 @@
+#pragma once
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+bool probe_memory_read(uint32_t address, uint8_t* output, size_t length);
+bool probe_memory_right_stick_center(uint8_t output[3]);