Define Switch2 commands

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

switch2_commands.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+
+enum class Switch2VendorCommand {
+    Unsupported,
+    SelectReport05,
+    SelectReport09,
+    InitializeUsb,
+};
+
+Switch2VendorCommand switch2_classify_vendor_request(
+    const uint8_t* data,
+    std::size_t length);
+
+std::size_t switch2_build_vendor_response(
+    Switch2VendorCommand command,
+    uint8_t* output,
+    std::size_t capacity);