Add an ERT admin panel

[Stop-Signs]

About the PR

Adds an admin ability to send ERT to a targetted station. allows for the admins/curators to customize the alert level and which roles spawn

Why / Balance

To streamline the ERT process for admins and curators.

Technical details

• StationERTComponent & StationERTSystem flags a station to get the Send ERT... verb
• StationERTSystem also handles the logic of spawning a requested ERT configuration
• SendERTEui on client & server lets admings configure an ERT team with nice buttons
• add ERT component to the base Nanotrasen station
• set up ERT team prototypes for amber/red/gamma/cburn

To be done

• ERT shuttle/better spawnpoints (they currently spawn like latejoins do)
• announcement for them being called (maybe)

Media

Requirements

• [x] I have tested all added content and changes.
• [x] I have added media to this PR or it does not require an ingame showcase.

Breaking changes

Changelog