Unpaywall URI command to launch Games

[Alfagun74]

Unpaywalling the launch endpoint would bring many benefits regarding game launches:

• 393 would not be necessary, as the launch uri would automatically launch gamevault with the current selected Exe and parameters.

• 406 could be implemented.

• In the future emulators and everything else necessary to run a game could be launched this way.

Todos:

• [x] Unpaywall launch URI.
• [x] Make shortcuts link to launch URI.
• [x] Ask if users want a shortcut upon clicking install.

[Yelo420]

Implemented