[feat] get file path in drag events

[Legend-Master]

Describe the problem

since we want to flip the default drag handler override in wry by default, it would be easier to switch if we provide some functionalities the web drag and drop is missing, getting the file path is one of them.

Describe the solution you'd like

An API you can call to get the file path like:

document.addEventListener('dragenter', async (ev) => {
  const paths = await getPaths(ev.dataTransfer.files)
  console.log(paths)
})

Alternatives considered

No response

Additional context

Some discussions: https://discord.com/channels/616186924390023171/986184094050316358/1398270029329334373

https://github.com/MicrosoftEdge/WebView2Samples/blob/main/SampleApps/WebView2APISample/assets/ScenarioDragDrop.html

#14373

[Legend-Master]

I have been trying to implement this but it seems to be a bit tricky that this requires you to use the chrome.webview.postMessageWithAdditionalObjects API and get the ICoreWebView2File inside add_WebMessageReceived
In wry/tauri we don't have anything like that yet and if want that to be a command, we'll need to add support for this type of IPCs

https://github.com/Legend-Master/wry/tree/windows-file-path-getter