Implement receiver HID++ connect/disconnect events

Many changes were made here but that was the biggest one.

There's currently a bug where std::system_error: Broken pipe is thrown
after launching the daemon with a receiver connector.

A workaround for this bug is to simply shake the mouse while starting
the daemon. I will investigate this soon.

src/logid/backend/hidpp/Report.h

@@ -60,6 +60,9 @@ namespace logid::backend::hidpp
         Report::Type type() const;
         void setType(Report::Type type);
 
+        logid::backend::hidpp::DeviceIndex deviceIndex();
+        void setDeviceIndex(hidpp::DeviceIndex index);
+
         uint8_t feature() const;
         void setFeature(uint8_t feature);
 
@@ -96,11 +99,6 @@ namespace logid::backend::hidpp
 
         bool isError20(hidpp20_error* error);
 
-        logid::backend::hidpp::DeviceIndex deviceIndex()
-        {
-            return static_cast<DeviceIndex>(_data[Offset::DeviceIndex]);
-        }
-
         std::vector<uint8_t> rawReport () const { return _data; }
     private:
         static constexpr std::size_t HeaderLength = 4;