Refactored the dashbot logic to dashbot directory

lib/dashbot/services/dashbot_service.dart

@@ -0,0 +1,27 @@
+import 'dart:convert';
+import 'package:ollama_dart/ollama_dart.dart';
+import '../features/explain.dart';
+import 'package:apidash/models/request_model.dart';
+
+class DashBotService {
+  final OllamaClient _client;
+  late final ExplainFeature _explainFeature;
+
+  DashBotService() : _client = OllamaClient(baseUrl: 'http://127.0.0.1:11434/api') {
+    _explainFeature = ExplainFeature(this);
+  }
+
+  Future<String> generateResponse(String prompt) async {
+    final response = await _client.generateCompletion(
+      request: GenerateCompletionRequest(model: 'llama3.2:3b', prompt: prompt),
+    );
+    return response.response.toString();
+  }
+
+  Future<String> handleRequest(String input, RequestModel? requestModel, dynamic responseModel) async {
+    if (input == "Explain API") {
+      return _explainFeature.explainLatestApi(requestModel: requestModel, responseModel: responseModel);
+    }
+    return generateResponse(input);
+  }
+}