StationSystem/jobs/partial spawning refactor (#7580)

* Partial work on StationSystem refactor.

* WIP station jobs API.

* forgor to fire off grid events.

* Partial implementation of StationSpawningSystem

* whoops infinite loop.

* Spawners should work now.

* it compiles.

* tfw

* Vestigial code cleanup.

* fix station deletion.

* attempt to make tests go brr

* add latejoin spawnpoints to test maps.

* make sure the station still exists while destructing spawners.

* forgot an exists check.

* destruction order check.

* hopefully fix final test.

* fail-safe radstorm.

* Deep-clean job code further. This is bugged!!!!!

* Fix job bug. (init order moment)

* whooo cleanup

* New job selection algorithm that tries to distribute fairly across stations.

* small nitpicks

* Give the heads their weights to replace the head field.

* make overflow assign take a station list.

* moment

* Fixes and test #1 of many.

* please fix nullspace

* AssignJobs should no longer even consider showing up on a trace.

* add comment.

* Introduce station configs, praying i didn't miss something.

* in one small change stations are now fully serializable.

* Further doc comments.

* whoops.

* Solve bug where assignjobs didn't account for roundstart.

* Fix spawning, improve the API.
Caught an oversight in stationsystem that should've broke everything but didn't, whoops.

* Goodbye JobController.

* minor fix..

* fix test fail, remove debug logs.

* quick serialization fixes.

* fixes..

* sus

* partialing

* Update Content.Server/Station/Systems/StationJobsSystem.Roundstart.cs

Co-authored-by: Kara <lunarautomaton6@gmail.com>

* Use dirtying to avoid rebuilding the list 2,100 times.

* add a bajillion more lines of docs (mostly in AssignJobs so i don't ever forget how it works)

* Update Content.IntegrationTests/Tests/Station/StationJobsTest.cs

Co-authored-by: Kara <lunarautomaton6@gmail.com>

* Add the Mysteriously Missing Captain Check.

* Put maprender back the way it belongs.

* I love addressing reviews.

* Update Content.Server/Station/Systems/StationJobsSystem.cs

Co-authored-by: Kara <lunarautomaton6@gmail.com>

* doc cleanup.

* Fix bureaucratic error, add job slot tests.

* zero cost abstractions when

* cri

* saner error.

* Fix spawning failing certain tests due to gameticker not handling falliability correctly.
Can't fix this until I refactor the rest of spawning code.

* submodule gaming

* Packedenger.

* Documentation consistency.

Co-authored-by: Kara <lunarautomaton6@gmail.com>

Content.Server/Station/StationConfig.Jobs.cs

@@ -0,0 +1,28 @@
+using Content.Shared.Roles;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Dictionary;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.List;
+
+namespace Content.Server.Station;
+
+public sealed partial class StationConfig
+{
+    [DataField("overflowJobs", required: true, customTypeSerializer: typeof(PrototypeIdListSerializer<JobPrototype>))]
+    private readonly List<string> _overflowJobs = default!;
+
+    /// <summary>
+    /// Jobs used at round start should the station run out of job slots.
+    /// Doesn't necessarily mean the station has infinite slots for the given jobs mid-round!
+    /// </summary>
+    public IReadOnlyList<string> OverflowJobs => _overflowJobs;
+
+
+    [DataField("availableJobs", required: true,
+        customTypeSerializer: typeof(PrototypeIdDictionarySerializer<List<int?>, JobPrototype>))]
+    private readonly Dictionary<string, List<int?>> _availableJobs = default!;
+
+    /// <summary>
+    /// Index of all jobs available on the station, of form
+    ///   job name: [round-start, mid-round]
+    /// </summary>
+    public IReadOnlyDictionary<string, List<int?>> AvailableJobs => _availableJobs;
+}