fix: Fixes character starting cities. (#1615)

### Summary

- Moves starting city info from AccountHandler to CharacterCreation
- Simplifies the logic of determining the starting cities
- Adds support for Trammel & Felucca for non-young accounts
- Fixes fall through starting city for v6+ in UOR era.
- All staff are force-sent to GA.

Closes #1408

Projects/UOContent.Tests/Tests/Utilities/TryParseTests.cs

@@ -1,5 +1,3 @@
-using Server;
-using System;
 using Xunit;
 
 namespace Server.Tests.Utility;