Use recommended by Tauri Cargo configuration options at least for Release builds

[zamazan4ik]

Hi!

I just found that the Release version of the application does not use recommended optimization options from the official Tauri docs. I think it would be nice to enable them, since it will lead at least to a smaller binary size and probably a bit better performance due to much more aggressive compiler optimizations from LTO.

Thank you.

[codehakase]

Good catch, there's no [profile.release] section at all currently. Will get this added.