New event: Approaching unknown shuttle (#24490)

* setup codebase

* Add first shuttle

* tak

* sync striker

* sync 2

* pipipi

* Preloaded roundstart shuttles!

* Make it abstract "PreloaderGrid" not "PreloaderShuttle"

* to do

* added china cuisin shuttle

* fixes

* add disaster evacpod

* remove enemy

* final shuttles

* weight 5 -> 10

* move data to component

* remove autotrailer touching

* doc, respath

* fix frozen positioning

* fixes + cvar

* finally

* fix evacpod

* remove blacklistrules

* remove `UnknownShuttleSpawnRule`, refactor `LoadMapRule` to support preloaded grids

* use tryload

* cleanup

* fixes

* use preloadedgrid for loneops

* weight unknown shuttles differently (preliminal)

* leftover

* cleanup and raffling

* partial review

* singleton gridpreloader no station coupling

* fix grid atmoses

* `roleLoadout` support for `LoadoutComponent`, fix missing gear

* weighting changes

* init logic fix

---------

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

Content.IntegrationTests/PoolManager.Cvars.cs

@@ -22,6 +22,7 @@ public static partial class PoolManager
         (CVars.ThreadParallelCount.Name,      "1"),
         (CCVars.GameRoleTimers.Name,          "false"),
         (CCVars.GridFill.Name,                "false"),
+        (CCVars.PreloadGrids.Name,            "false"),
         (CCVars.ArrivalsShuttles.Name,        "false"),
         (CCVars.EmergencyShuttleEnabled.Name, "false"),
         (CCVars.ProcgenPreload.Name,          "false"),