New user agent based on core package

Author: mugikhan

packages/powersync_core/lib/src/user_agent/user_agent_native.dart

@@ -10,7 +10,7 @@ String powerSyncUserAgent() {
   }
   // Ideally we'd get an OS version as well, but that's a little complex.
   // Platform.operatingSystemVersion is very verbose.
-  return 'powersync-dart/$libraryVersion $dart ${Platform.operatingSystem}';
+  return 'powersync-dart-core/$libraryVersion $dart ${Platform.operatingSystem}';
 }
 
 Map<String, String> userAgentHeaders() {

packages/powersync_core/lib/src/user_agent/user_agent_web.dart

@@ -1,7 +1,7 @@
 import 'package:powersync_core/src/version.dart';
 
 String powerSyncUserAgent() {
-  return 'powersync-dart/$libraryVersion Dart (flutter-web)';
+  return 'powersync-dart-core/$libraryVersion Dart (flutter-web)';
 }
 
 Map<String, String> userAgentHeaders() {

packages/powersync_core/lib/src/version.dart

@@ -1 +1 @@
-const String libraryVersion = '1.9.3';
+const String libraryVersion = '0.0.1';

tool/update_version.dart

@@ -2,7 +2,7 @@ import 'dart:io';
 import 'package:yaml/yaml.dart';
 
 void main() {
-  final pubspecFile = File('packages/powersync/pubspec.yaml');
+  final pubspecFile = File('packages/powersync_core/pubspec.yaml');
   final pubspecContent = pubspecFile.readAsStringSync();
   final yaml = loadYaml(pubspecContent);
   final version = yaml['version'];