Use Native OS File Dialog

[werdnahull]

Feature/enhancement description:
Godot's built-in file open/save dialogs are not great. It would be nice to use the native OS dialogs for open, save, and export, which would greatly increase workflow. Something like https://github.com/98teg/NativeDialogs would likely work.

[Calinou]

Godot 4.2 and later has built-in support for native file dialogs as part of the FileDialog node – no need for an extension. Material Maker is being ported to Godot 4, so it'll surely be using 4.2 or later.

[u3shit]

If you implement this, please make this optional. Most native dialog implementation I saw insists on using gtk3 on linux, but gtk3's file selector is so utter crap that literally anything is better than that (even if it's just a simple text box where you can enter a file path, that already has a feature gtk3's file selector doesn't have).
(And I really hope godot does load the toolkit library dynamically, I don't want to install gtk3)

[RobotRoss]

+1 to this - The current file dialog works if your computer has a single hard drive, but if you have resources stored across drives or on network shares, it's downright awful.