REFACTOR: Improved Package Structure

packages/genai/lib/llm_model.dart

@@ -0,0 +1,40 @@
+import 'llm_input_payload.dart';
+import 'llm_provider.dart';
+import 'llm_request.dart';
+
+class LLMModel {
+  const LLMModel(this.identifier, this.modelName, this.provider);
+  final String identifier;
+  final String modelName;
+  final LLMProvider provider;
+
+  static Map toJson(LLMModel m) {
+    return {'identifier': m.identifier, 'provider': m.provider.name};
+  }
+
+  static LLMModel fromJson(Map json) {
+    return LLMProvider.fromName(
+      json['provider'],
+    ).getLLMByIdentifier(json['identifier']);
+  }
+}
+
+abstract class ModelController {
+  LLMInputPayload get inputPayload => throw UnimplementedError();
+
+  LLMRequestDetails createRequest(
+    LLMModel model,
+    LLMInputPayload inputPayload, {
+    bool stream = false,
+  }) {
+    throw UnimplementedError();
+  }
+
+  String? outputFormatter(Map x) {
+    throw UnimplementedError();
+  }
+
+  String? streamOutputFormatter(Map x) {
+    throw UnimplementedError();
+  }
+}