feat: proxy cmd support

Fixes #949

lib/data/model/server/proxy_command_config.g.dart

@@ -0,0 +1,39 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'proxy_command_config.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_ProxyCommandConfig _$ProxyCommandConfigFromJson(Map<String, dynamic> json) =>
+    _ProxyCommandConfig(
+      command: json['command'] as String,
+      args: (json['args'] as List<dynamic>?)?.map((e) => e as String).toList(),
+      workingDirectory: json['workingDirectory'] as String?,
+      environment: (json['environment'] as Map<String, dynamic>?)?.map(
+        (k, e) => MapEntry(k, e as String),
+      ),
+      timeout: json['timeout'] == null
+          ? const Duration(seconds: 30)
+          : Duration(microseconds: (json['timeout'] as num).toInt()),
+      retryOnFailure: json['retryOnFailure'] as bool? ?? false,
+      maxRetries: (json['maxRetries'] as num?)?.toInt() ?? 3,
+      requiresExecutable: json['requiresExecutable'] as bool? ?? false,
+      executableName: json['executableName'] as String?,
+      executableDownloadUrl: json['executableDownloadUrl'] as String?,
+    );
+
+Map<String, dynamic> _$ProxyCommandConfigToJson(_ProxyCommandConfig instance) =>
+    <String, dynamic>{
+      'command': instance.command,
+      'args': instance.args,
+      'workingDirectory': instance.workingDirectory,
+      'environment': instance.environment,
+      'timeout': instance.timeout.inMicroseconds,
+      'retryOnFailure': instance.retryOnFailure,
+      'maxRetries': instance.maxRetries,
+      'requiresExecutable': instance.requiresExecutable,
+      'executableName': instance.executableName,
+      'executableDownloadUrl': instance.executableDownloadUrl,
+    };