A start on B19 compatibility

[TheAtomicOption]

I loaded everything into Visual Studio with B19 versions of the libs (all working without Psychology in RimWorld v0.19.2009.r486), to see if getting it to compile might be as simple as changing a few names or signatures. Sadly not that easy. There's more needed beyond this set of fixes before it will even compile.

There were a couple of those easy-ish name and signature edits, so I'm throwing those into this PR so you don't have to do them. You should definitely glance over all these changes to make sure they're correct/appropriate. I kept the commits atomic so it should be fairly straight forward to look through them or fix/revert specific ones.

Known Issues not fixed here because IDK what some of the things are:

• InteractionWorker.Interacted signature now requires three outs related to Letters, but I don't know what the concept of a Letter is in RimWorld source, so IDK where to get the values. Applies to:
  • InteractionWorker_PlanDate.cs
  • InteractionWorker_HangOut.cs
  • InteractionWorker_Conversation.cs
• FactionBase has been renamed SettlementBase, but an instance of SettlementBase has no property namedByPlayer, so there's one line in PsychologyBase.cs that IDK how to fix. Maybe it's no longer needed??
• Faction.OfSpacer no longer exists and IDK how to replace it to get that faction. null?
• pawn.jobs.curDriver no longer has a layingDown property and LayingDownState no longer exists. Might be related to the abstract class definition of JobDriver that includes public virtual bool CanBeginNowWhileLyingDown(); but I'm not sure what the original use is doing.

[rwpsychology]

Now that B19 is officially released, I've already updated it myself.

[TheAtomicOption]

No worries. I just gave it a shot cause I'm super eager to have your mod in B19 and the repository hadn't had activity since June.

Thanks for all your work!