Add an option to set Material Files as the default file manager on rooted systems, and as a file chooser option on non-rooted systems

I like using Material Files but the problem is that if I want to choose a file to upload to a website, I cannot use Material Files to do that and I have to resort to using the Google file manager. Since I'm on a rooted phone, would it be possible to override the native Android functionality to force open material files or just add it as an option when opening a file? This already exists for opening image files but it would be good if it would do this for all file types.

Start by tracing the existing behavior for opening image files and the Android file chooser entry points. Determine how rooted systems could support a default file manager and how non-rooted systems could expose Material Files as a chooser option; done means file uploads and other file types can use the requested flows.