fix(core): Optimizes strings / .NET 5 compatibility changes (#354)

- [X] Removes some string allocations (e.g. split)
- [X] Optimizes some collections
- [X] Converts insensitive to extension methods of built-ins.
- [X] Adds ordinal (case sensitive) string helpers
- [X] Fixes conditionals for in-game commands so they use Ordinal comparisons.
- [X] Replaces ToLower.Contains with InsensitiveContains
- [X] Adds ValueStringBuilder
- [X] Implements ValueStringBuilder in a few places where it makes sense
- [X] Removes the redundant Wrap function and replaces it with an optimized version
- [X] Fixes list conversions in Utility

Closes #351

Bumps release version

Projects/UOContent/Engines/Factions/Core/Faction.cs

@@ -1277,7 +1277,7 @@ namespace Server.Factions
             {
                 var faction = factions[i];
 
-                if (Insensitive.Equals(faction.Definition.FriendlyName, name))
+                if (faction.Definition.FriendlyName.InsensitiveEquals(name))
                 {
                     return faction;
                 }