Began implementation of WCH-Link protocol, for the WCH-LinkE debug tool.

Foundations have been laid.

src/DebugToolDrivers/WCH/WchLinkBase.hpp

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <cstdint>
+#include <memory>
+#include <optional>
+
+#include "src/DebugToolDrivers/DebugTool.hpp"
+#include "src/DebugToolDrivers/USB/UsbDevice.hpp"
+
+#include "Protocols/WchLink/WchLinkInterface.hpp"
+
+#include "WchGeneric.hpp"
+#include "DeviceInfo.hpp"
+
+namespace DebugToolDrivers::Wch
+{
+    class WchLinkBase: public DebugTool, public Usb::UsbDevice
+    {
+    public:
+        WchLinkBase(
+            WchLinkVariant variant,
+            std::uint16_t vendorId,
+            std::uint16_t productId,
+            std::uint8_t wchLinkUsbInterfaceNumber
+        );
+
+        void init() override;
+
+        void close() override;
+
+        std::string getSerialNumber() override;
+
+    protected:
+        WchLinkVariant variant;
+
+        std::uint8_t wchLinkUsbInterfaceNumber;
+        std::unique_ptr<Usb::UsbInterface> wchLinkUsbInterface = nullptr;
+        std::unique_ptr<Protocols::WchLink::WchLinkInterface> wchLinkInterface = nullptr;
+
+        mutable std::optional<DeviceInfo> cachedDeviceInfo = std::nullopt;
+
+        const DeviceInfo& getDeviceInfo() const;
+    };
+}