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/Misc/NameVerification.cs

@@ -201,7 +201,7 @@ namespace Server.Misc
 
             for (var i = 0; i < disallowed.Length; ++i)
             {
-                var indexOf = name.IndexOf(disallowed[i], StringComparison.Ordinal);
+                var indexOf = name.IndexOfOrdinal(disallowed[i]);
 
                 if (indexOf == -1)
                 {
@@ -235,7 +235,7 @@ namespace Server.Misc
 
             for (var i = 0; i < startDisallowed.Length; ++i)
             {
-                if (name.StartsWith(startDisallowed[i], StringComparison.Ordinal))
+                if (name.StartsWithOrdinal(startDisallowed[i]))
                 {
                     return false;
                 }