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/Server/Race.cs

@@ -74,7 +74,7 @@ namespace Server
 
             for (var i = 0; i < m_RaceNames.Length; ++i)
             {
-                if (Insensitive.Equals(m_RaceNames[i], value))
+                if (m_RaceNames[i].InsensitiveEquals(value))
                 {
                     return m_RaceValues[i];
                 }