Start support for open with in metadata

[andydotxyz]

Begin with linux as it's just metadata :)

Testing with an app of mine, adding The following to FyneApp.toml:

[OpenWith]
MimeTypes = "inode/directory"

[sdassow]

Trying to fully grasp this without additional documentation was a bit of guesswork for me until I found https://specifications.freedesktop.org/desktop-entry/latest/mime-types.html - should we maybe reference it somehow?

[andydotxyz]

Trying to fully grasp this without additional documentation was a bit of guesswork for me until I found https://specifications.freedesktop.org/desktop-entry/latest/mime-types.html - should we maybe reference it somehow?

Hmm, well - mime type is a universal thing and I don't want to link this to a system specific doc.
Next is the macOS support where we will look up the internal identifiers based on mime and hook appropriate code in.

A documentation page will be needed - but what is the intent of linking it back to the specifics of desktop entries?

[sdassow]

A documentation page will be needed - but what is the intent of linking it back to the specifics of desktop entries?

Not necessary, it was just for general clarity, because the big picture wasn't immediately obvious.
That of course will be different if there's a documentation page, so all good.

[dweymouth]

I am late on review but shouldn't the naming on this be more like CanOpen *ContentTypes? "OpenWith" sounds more like the OS side of the equation, where the user is choosing which app it wants to associate with a given file type. This is advertising to the OS what types you can open.

[andydotxyz]

Thanks Drew, that is a great point. I will refactor on the landed code.