add game dumping, add game transfer (switch2switch) via usb, add multi game selecting, fix bugs (see below).

- added more es commands.
- fixed usb install potential hang if the exit command is sent, but the client stops responding (timeout is now 3s).
- added multi select to the games menu.
- added game dumping.
- added switch2switch support by having a switch act as a usb client to transfer games.
- replace std::find with std::ranges (in a few places).
- fix rounding of icon in progress box being too round.
- fix file copy helper in progress box not updating the progress bar.

sphaira/include/usb/usb_uploader.hpp

@@ -0,0 +1,47 @@
+#pragma once
+
+#include "usb/usbhs.hpp"
+
+#include <string>
+#include <memory>
+#include <span>
+#include <switch.h>
+
+namespace sphaira::usb::upload {
+
+struct Usb {
+    enum { USBModule = 523 };
+
+    enum : Result {
+        Result_BadMagic = MAKERESULT(USBModule, 0),
+        Result_Exit = MAKERESULT(USBModule, 1),
+        Result_BadCount = MAKERESULT(USBModule, 2),
+        Result_BadTransferSize = MAKERESULT(USBModule, 3),
+        Result_BadTotalSize = MAKERESULT(USBModule, 4),
+        Result_BadCommand = MAKERESULT(USBModule, 4),
+    };
+
+    Usb(u64 transfer_timeout);
+    virtual ~Usb();
+
+    virtual Result Read(const std::string& path, void* buf, s64 off, s64 size, u64* bytes_read) = 0;
+
+    Result IsUsbConnected(u64 timeout) {
+        return m_usb->IsUsbConnected(timeout);
+    }
+
+    // waits for connection and then sends file list.
+    Result WaitForConnection(u64 timeout, std::span<const std::string> names);
+
+    // polls for command, executes transfer if possible.
+    // will return Result_Exit if exit command is recieved.
+    Result PollCommands();
+
+private:
+    Result FileRangeCmd(u64 data_size);
+
+private:
+    std::unique_ptr<usb::UsbHs> m_usb;
+};
+
+} // namespace sphaira::usb::upload