(wip|[skip ci]): Integrate TextString encoding into CBOR class

- Add support for encoding string data using the `TextString` class within the `CBOR::encode` method.
- Update the CBOR class to handle the `string` type by delegating encoding to `TextString::encode`.
- Keep the `decode` method as a placeholder for future implementation.

Author: shahmal1yev

src/CBOR/CBOR.php

@@ -11,6 +11,7 @@
 
 namespace ATProto\Core\CBOR;
 
+use ATProto\Core\CBOR\MajorTypes\TextString;
 use ATProto\Core\CBOR\MajorTypes\UnsignedInteger;
 
 class CBOR
@@ -21,13 +22,16 @@ public static function encode(string|int|array $data): string
             case 'integer':
                 return UnsignedInteger::encode($data);
             break;
+            case 'string':
+                return TextString::encode($data);
+            break;
         }
 
         throw new \ValueError("Unsupported type: " . gettype($data));
     }
 
     public static function decode(string $data): int
     {
-        return UnsignedInteger::decode((string) $data);
+        // TODO
     }
 }