[Files] Shortcut to share a file

[skjnldsv]

Subset of #30484

@nimishavijay I find the . (dot) to share shortcut very odd. Don't we have better alternatives? :)
Someone suggested @ for sharing, what do you think of that ?

Originally posted by @skjnldsv in #30484

/me stares at german keyboard

Not sure if AltGr+Q is viable… Do we actually need to make different shortcuts for different languages?

Originally posted by @nickvergessen in #30484

dot in French keyboard is shift+;, same issue

Originally posted by @skjnldsv in #30484