Refactor how jobs are handed out (#5422)

* Completely refactor how job spawning works

* Remove remains of old system.

* Squash the final bug, cleanup.

* Attempt to fix tests

* Adjusts packed's round-start crew roster, re-enables a bunch of old roles.
Also adds the Central Command Official as a proper role.

* pretty up ui

* refactor StationSystem into the correct folder & namespace.

* remove a log, make sure the lobby gets updated if a new map is spontaneously added.

* re-add accidentally removed log

* We do a little logging

* we do a little resolving

* we do a little documenting

* Renamed OverflowJob to FallbackOverflowJob
Allows stations to configure their own roundstart overflow job list.

* narrator: it did not compile

* oops

* support having no overflow jobs

* filescope for consistency

* small fixes

* Bumps a few role counts for Packed, namely engis

* log moment

* E

* Update Resources/Prototypes/Entities/Objects/Misc/identification_cards.yml

Co-authored-by: Leon Friedrich <60421075+ElectroJr@users.noreply.github.com>

* Update Content.Server/Maps/GameMapPrototype.cs

Co-authored-by: Leon Friedrich <60421075+ElectroJr@users.noreply.github.com>

* factored job logic, cleanup.

* e

* Address reviews

* Remove the concept of a "default" grid.
It has no future in our new multi-station world

* why was clickable using that in the first place

* fix bad evil bug that almost slipped through
also adds chemist

* rms obsolete things from chemist

* Adds a sanity fallback

* address reviews

* adds ability to set name

* fuck

* cleanup joingame

Content.Shared/Roles/JobPrototype.cs

@@ -43,20 +43,6 @@ namespace Content.Shared.Roles
         [DataField("head")]
         public bool IsHead { get; private set; }
 
-        /// <summary>
-        ///     The total amount of people that can start with this job round-start.
-        /// </summary>
-        public int SpawnPositions => _spawnPositions ?? TotalPositions;
-
-        [DataField("spawnPositions")]
-        private int? _spawnPositions;
-
-        /// <summary>
-        ///     The total amount of positions available.
-        /// </summary>
-        [DataField("positions")]
-        public int TotalPositions { get; private set; }
-
         [DataField("startingGear")]
         public string? StartingGear { get; private set; }