Add shortcut for opening urls in entry

[nthnd]

Pressing u from within an Entry view will now show a navigable list of urls extracted from that entry which can either be copied or opened in a browser with the c and o hotkeys.

fixes #21

[ckampfe]

@nate-sys thank you for the patch! I will give this a try as soon as I can.

[HenkVanMaanen]

Nice work nate-sys!

Just a remark, is this the way to go or is the OSC 8 terminal code the way to go? Like foot and other terminals already have this functionality build in. The program would only have to emit the urls in a specific format.

[nthnd]

@HenkVanMaanen I was not aware of OSC 8. What you suggested is a good idea. I'll look into it. As far is the way to go? I'll let the maintainers decide that 😅.

[ckampfe]

Thank you @nate-sys . Would you be able to post a screen recording and/or screenshot of this functionality? I usually use something like https://www.cockos.com/licecap/