Revert "Removed extension"

This reverts commit c586c9f.

Author: papafe

src/MongoDB.Driver/Core/Misc/Utils.cs renamed to src/MongoDB.Bson/ObjectModel/BsonTypeExtensions.cs

@@ -14,13 +14,19 @@
  */
 
 using System;
-using MongoDB.Bson;
 
-namespace MongoDB.Driver.Core.Misc
+namespace MongoDB.Bson
 {
-    internal static class Utils
+    /// <summary>
+    /// A static class containing extension methods for <see cref="BsonType"/>.
+    /// </summary>
+    public static class BsonTypeExtensions
     {
-        public static string ConvertBsonTypeToServerRepresentation(BsonType type)
+        /// <summary>
+        /// Maps a <see cref="BsonType"/> to its corresponding string representation.
+        /// </summary>
+        /// <param name="type">The input type to map.</param>
+        public static string ToStringRepresentation(this BsonType type)
         {
             return type switch
             {
@@ -48,4 +54,4 @@ public static string ConvertBsonTypeToServerRepresentation(BsonType type)
             };
         }
     }
-}
+}

src/MongoDB.Driver.Encryption/CsfleSchemaBuilder.cs

@@ -281,7 +281,7 @@ private static BsonDocument CreateEncryptDocument(
 
             if (bsonTypes != null)
             {
-                var convertedBsonTypes = bsonTypes.Select(Utils.ConvertBsonTypeToServerRepresentation).ToList();
+                var convertedBsonTypes = bsonTypes.Select(type => type.ToStringRepresentation()).ToList();
 
                 if (convertedBsonTypes.Count == 0)
                 {

src/MongoDB.Driver/Linq/Linq3Implementation/Ast/AstEnumExtensions.cs

@@ -16,13 +16,12 @@
 using System;
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization;
-using MongoDB.Driver.Core.Misc;
 
 namespace MongoDB.Driver.Linq.Linq3Implementation.Ast
 {
     internal static class AstEnumExtensions
     {
-        public static string Render(this BsonType type) => Utils.ConvertBsonTypeToServerRepresentation(type);
+        public static string Render(this BsonType type) => type.ToStringRepresentation();
 
         public static string Render(this ByteOrder byteOrder)
         {

src/MongoDB.Driver/Linq/Linq3Implementation/Ast/Filters/AstTypeFilterOperation.cs

@@ -52,11 +52,11 @@ public override BsonValue Render()
             if (_types.Count == 1)
             {
                 var type = _types[0];
-                return new BsonDocument("$type", Utils.ConvertBsonTypeToServerRepresentation(type));
+                return new BsonDocument("$type", type.ToStringRepresentation());
             }
             else
             {
-                return new BsonDocument("$type", new BsonArray(_types.Select(Utils.ConvertBsonTypeToServerRepresentation)));
+                return new BsonDocument("$type", new BsonArray(_types.Select(type => type.ToStringRepresentation())));
             }
         }
     }