Add JSON stringification for UUIDs

src/util/Uuid.zig

@@ -33,6 +33,10 @@ pub fn format(value: Uuid, comptime _: []const u8, _: std.fmt.FormatOptions, wri
     });
 }
 
+pub fn jsonStringify(value: Uuid, _: std.json.StringifyOptions, writer: anytype) !void {
+    try std.fmt.format(writer, "\"{}\"", .{value});
+}
+
 pub const ParseError = error{
     InvalidCharacter,
     InvalidLength,