Add module options to Show Names only on keypress and Show/Hide names for AI

Option are added to the Interaction module:

1 - The name and rank tags are always hidden unless the player presses a hot key, in which case they are shown for around 1.5 seconds before dissapearing again.

This was a request of my clan, as many people consider the name tags to be distracting and unnecesary most of the time, but useful at specific moments.

Default keybind: ~~Caps Lock~~ `tilde`

2 - Show names for AI. Default: No

Also the name tag can be selected to be hidden for a specific unit by setting the `ÀGM_hideName` object variable to true. This is intended to be used by Game Masters, which sometimes roam the map using hidden with hideObject.