add clipboard.copyImage ipc

the web clipboard api only works when focused. so when you try to copy an image but immediately unfocus while its still fetching the image, it will fail. this ipc ensures it will always work even without focus

src/preload/VesktopNative.ts

@@ -71,5 +71,9 @@ export const VesktopNative = {
         onActivity(cb: (data: string) => void) {
             ipcRenderer.on(IpcEvents.ARRPC_ACTIVITY, (_, data: string) => cb(data));
         }
+    },
+    clipboard: {
+        copyImage: (imageBuffer: Uint8Array, imageSrc: string) =>
+            invoke<void>(IpcEvents.CLIPBOARD_COPY_IMAGE, imageBuffer, imageSrc)
     }
 };