Completely rework SNBT Parser

(NOTE: ChatGPT Was used for regex only)

lib/omv/types/list.dart

@@ -1,4 +1,3 @@
-import 'package:libac_dart/nbt/Stream.dart';
 
 class list {
   List<dynamic> _list = [];

lib/omv/types/string.dart

@@ -28,7 +28,7 @@ class string {
   String toString() => value ?? '';
 
   // Conversion to bool
-  bool toBool() => value != null && value.isNotEmpty;
+  bool toBool() => value.isNotEmpty;
 
   // Equality operator
   @override