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/Pathing/FastMovement.cs

@@ -245,7 +245,7 @@ namespace Server.Movement
             {
                 itemData = TileData.ItemTable[tile.ID & TileData.MaxItemValue];
 
-                if (m.Flying && Insensitive.Equals(itemData.Name, "hover over"))
+                if (m.Flying && itemData.Name.InsensitiveEquals("hover over"))
                 {
                     newZ = tile.Z;
                     return true;
@@ -350,7 +350,7 @@ namespace Server.Movement
                 itemData = item.ItemData;
                 flags = itemData.Flags;
 
-                if (m.Flying && Insensitive.Equals(itemData.Name, "hover over"))
+                if (m.Flying && itemData.Name.InsensitiveEquals("hover over"))
                 {
                     newZ = item.Z;
                     return true;