Added pascal case policy

src/JsonNamingPolicies.cs

@@ -4,11 +4,16 @@ namespace Yoh.Text.Json.NamingPolicies
 {
     public static class JsonNamingPolicies
     {
+        private static JsonCamelCaseNamingPolicy? _camelCase;
+        private static JsonPascalCaseNamingPolicy? _pascalCase;
         private static JsonSnakeCaseLowerNamingPolicy? _snakeCaseLower;
         private static JsonSnakeCaseUpperNamingPolicy? _snakeCaseUpper;
         private static JsonKebabCaseLowerNamingPolicy? _kebabCaseLower;
         private static JsonKebabCaseUpperNamingPolicy? _kebabCaseUpper;
-        private static JsonCamelCaseNamingPolicy? _camelCase;
+
+        public static JsonNamingPolicy CamelCase => _camelCase ??= new JsonCamelCaseNamingPolicy();
+
+        public static JsonNamingPolicy PascalCase => _pascalCase ??= new JsonPascalCaseNamingPolicy();
 
         public static JsonNamingPolicy SnakeCaseLower => _snakeCaseLower ??= new JsonSnakeCaseLowerNamingPolicy();
 
@@ -17,7 +22,5 @@ public static class JsonNamingPolicies
         public static JsonNamingPolicy KebabCaseLower => _kebabCaseLower ??= new JsonKebabCaseLowerNamingPolicy();
 
         public static JsonNamingPolicy KebabCaseUpper => _kebabCaseUpper ??= new JsonKebabCaseUpperNamingPolicy();
-
-        public static JsonNamingPolicy CamelCase => _camelCase ??= new JsonCamelCaseNamingPolicy();
     }
 }

src/JsonPascalCaseNamingPolicy.cs

@@ -0,0 +1,18 @@
+using System;
+
+namespace Yoh.Text.Json.NamingPolicies
+{
+    internal sealed class JsonPascalCaseNamingPolicy : JsonNamingPolicyBase
+    {
+        protected override int TryWriteWord(bool first, ReadOnlySpan<char> word, Span<char> destination)
+        {
+            var written = word.ToLowerInvariant(destination);
+            if (written > 0)
+            {
+                destination[0] = char.ToUpperInvariant(destination[0]);
+            }
+
+            return written;
+        }
+    }
+}