[Feature Request] On device file editing

[dobrovolsky]

Chrome browsers support saving files directly to the disk. It can be useful for track editing.
But the thing is that it's chrome only, no Firefox nor Safari yet.

Also Chrome supports opening folders, but I think it's quite challenging to implement in terms of UX.
May be linked to #151

https://developer.mozilla.org/en-US/docs/Web/API/Window/showOpenFilePicker

I have PoC implementation and usually it works, it sure has some limitations, but in general it's quite useful.

[vcoppe]

If the same local file API was available for all major browsers, I would 100% support this. As this is not the case, my idea is still to create a desktop app version of the website using Tauri, as discussed in #151.