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/Items/Body Parts/Head.cs

@@ -81,17 +81,17 @@ namespace Server.Items
 
                     if (format != null)
                     {
-                        if (format.StartsWith("the head of ", StringComparison.Ordinal))
+                        if (format.StartsWithOrdinal("the head of "))
                         {
                             format = format.Substring(14); // "the head of|..."
                         }
 
-                        if (format.EndsWith(", taken in a duel", StringComparison.Ordinal))
+                        if (format.EndsWithOrdinal(", taken in a duel"))
                         {
                             format = format.Substring(0, format.Length - ", taken in a duel".Length);
                             HeadType = HeadType.Duel;
                         }
-                        else if (format.EndsWith(", taken in a tournament", StringComparison.Ordinal))
+                        else if (format.EndsWithOrdinal(", taken in a tournament"))
                         {
                             format = format.Substring(0, format.Length - ", taken in a tournament".Length);
                             HeadType = HeadType.Tournament;

Projects/UOContent/Items/Books/BaseBook.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Text;
+using Server.Buffers;
 using Server.ContextMenus;
 using Server.Gumps;
 using Server.Multis;
@@ -119,7 +120,7 @@ namespace Server.Items
         {
             get
             {
-                var sb = new StringBuilder();
+                using var sb = new ValueStringBuilder(stackalloc char[256]);
 
                 foreach (var bpi in Pages)
                 {

Projects/UOContent/Items/Misc/Teleporter.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using Server.Buffers;
 using Server.Mobiles;
 using Server.Network;
 using Server.Spells;
@@ -594,7 +595,7 @@ namespace Server.Items
                 {
                     isMatch = true;
                 }
-                else if (m_Substring != null && e.Speech.ToLower().Contains(m_Substring.ToLower(), StringComparison.Ordinal))
+                else if (m_Substring != null && e.Speech.InsensitiveContains(m_Substring))
                 {
                     isMatch = true;
                 }
@@ -1189,7 +1190,7 @@ namespace Server.Items
         {
             base.GetProperties(list);
 
-            var props = new StringBuilder();
+            using var props = new ValueStringBuilder(stackalloc char[128]);
 
             if (GetFlag(ConditionFlag.DenyMounted))
             {

Projects/UOContent/Items/Special/House Raffle/HouseRaffleManagementGump.cs

@@ -262,7 +262,7 @@ namespace Server.Gumps
                     return 1;
                 }
 
-                var result = Insensitive.Compare(x.From.Name, y.From.Name);
+                var result = x.From.Name.InsensitiveCompare(y.From.Name);
 
                 return result == 0 ? x.Date.CompareTo(y.Date) : result;
             }
@@ -310,7 +310,7 @@ namespace Server.Gumps
                     return 1;
                 }
 
-                var result = Insensitive.Compare(a.Username, b.Username);
+                var result = a.Username.InsensitiveCompare(b.Username);
 
                 return result == 0 ? x.Date.CompareTo(y.Date) : result;
             }