In-Game: ability to assign self to call via ingame command

[casperiv0]

1. /assign command 1.5 The user must be authenticated from here -> authentication: Auth via browser linking?
2. Opens a menu with all the active 911-calls
3. Can click on any of the list items to assign them to the 911 call

[casperiv0]

Idea:

1. Fetch the current user via game identifier
2. In the command, player (in-game) must mention "active officer" or "active ems-fd deputy" 2.1. player can directly mention the call case number here too
3. Opens a menu with all the active 911 calls
4. Player (in-game NUI?) can select any active 911 call to assign themselves too