Add Flutter LLM configuration validation model

Author: DevDesai444

sdk/runanywhere-flutter/packages/runanywhere/lib/features/llm/llm_configuration.dart

@@ -0,0 +1,48 @@
+import 'package:runanywhere/core/protocols/component/component_configuration.dart';
+import 'package:runanywhere/core/types/model_types.dart';
+import 'package:runanywhere/foundation/error_types/sdk_error.dart';
+
+/// Configuration for the LLM component.
+///
+/// Mirrors the validation contract used by the Swift and Kotlin SDKs so
+/// invalid parameters fail in Dart before crossing the FFI boundary.
+class LLMConfiguration implements ComponentConfiguration {
+  final String? modelId;
+  final InferenceFramework? preferredFramework;
+  final int contextLength;
+  final double temperature;
+  final int maxTokens;
+  final String? systemPrompt;
+  final bool streamingEnabled;
+
+  const LLMConfiguration({
+    this.modelId,
+    this.preferredFramework,
+    this.contextLength = 2048,
+    this.temperature = 0.7,
+    this.maxTokens = 100,
+    this.systemPrompt,
+    this.streamingEnabled = true,
+  });
+
+  @override
+  void validate() {
+    if (contextLength <= 0 || contextLength > 32768) {
+      throw SDKError.validationFailed(
+        'Context length must be between 1 and 32768',
+      );
+    }
+
+    if (!temperature.isFinite || temperature < 0 || temperature > 2.0) {
+      throw SDKError.validationFailed(
+        'Temperature must be between 0 and 2.0',
+      );
+    }
+
+    if (maxTokens <= 0 || maxTokens > contextLength) {
+      throw SDKError.validationFailed(
+        'Max tokens must be between 1 and context length',
+      );
+    }
+  }
+}