Add BenchmarkRun Class to Model Complete Benchmark Runs

This commit introduces the `BenchmarkRun` class, designed to model a complete benchmark run. The class encapsulates all data and sub-models related to a benchmark, providing a centralized object to handle various aspects of a benchmark run.

The `BenchmarkRun` class includes the following sub-models:
- `RepositoryInfo`: Information about the repository and team.
- `RunDetails`: Specific details like the run identifier, command, and timings.
- `TaskInfo`: Information about the task being benchmarked.
- `Metrics`: Performance metrics for the benchmark run.
- `Config`: Configuration settings for the benchmark run.

A `reachedCutoff` field is also included to indicate whether a certain cutoff was reached during the benchmark run.

Methods for serializing and deserializing the object to and from JSON are also provided.

frontend/lib/models/benchmark/benchmark_run.dart

@@ -0,0 +1,72 @@
+import 'package:auto_gpt_flutter_client/models/benchmark/config.dart';
+import 'package:auto_gpt_flutter_client/models/benchmark/metrics.dart';
+import 'package:auto_gpt_flutter_client/models/benchmark/repository_info.dart';
+import 'package:auto_gpt_flutter_client/models/benchmark/run_details.dart';
+import 'package:auto_gpt_flutter_client/models/benchmark/task_info.dart';
+
+/// `BenchmarkRun` represents a complete benchmark run and encapsulates all associated data.
+///
+/// This class is a comprehensive model that includes various sub-models, each corresponding to a different aspect of a benchmark run.
+/// It includes repository information, run details, task information, metrics, a flag indicating if the cutoff was reached, and configuration settings.
+class BenchmarkRun {
+  /// Information about the repository and team associated with the benchmark run.
+  final RepositoryInfo repositoryInfo;
+
+  /// Specific details about the benchmark run, like unique run identifier, command, and timings.
+  final RunDetails runDetails;
+
+  /// Information about the task being benchmarked, including its description and expected answer.
+  final TaskInfo taskInfo;
+
+  /// Performance metrics related to the benchmark run.
+  final Metrics metrics;
+
+  /// A boolean flag indicating whether the benchmark run reached a certain cutoff.
+  final bool reachedCutoff;
+
+  /// Configuration settings related to the benchmark run.
+  final Config config;
+
+  /// Constructs a new `BenchmarkRun` instance.
+  ///
+  /// [repositoryInfo]: Information about the repository and team.
+  /// [runDetails]: Specific details about the benchmark run.
+  /// [taskInfo]: Information about the task being benchmarked.
+  /// [metrics]: Performance metrics for the benchmark run.
+  /// [reachedCutoff]: A flag indicating if the benchmark run reached a certain cutoff.
+  /// [config]: Configuration settings for the benchmark run.
+  BenchmarkRun({
+    required this.repositoryInfo,
+    required this.runDetails,
+    required this.taskInfo,
+    required this.metrics,
+    required this.reachedCutoff,
+    required this.config,
+  });
+
+  /// Creates a `BenchmarkRun` instance from a map.
+  ///
+  /// [json]: A map containing key-value pairs corresponding to `BenchmarkRun` fields.
+  ///
+  /// Returns a new `BenchmarkRun` populated with values from the map.
+  factory BenchmarkRun.fromJson(Map<String, dynamic> json) => BenchmarkRun(
+        repositoryInfo: RepositoryInfo.fromJson(json['repository_info']),
+        runDetails: RunDetails.fromJson(json['run_details']),
+        taskInfo: TaskInfo.fromJson(json['task_info']),
+        metrics: Metrics.fromJson(json['metrics']),
+        reachedCutoff: json['reached_cutoff'],
+        config: Config.fromJson(json['config']),
+      );
+
+  /// Converts the `BenchmarkRun` instance to a map.
+  ///
+  /// Returns a map containing key-value pairs corresponding to `BenchmarkRun` fields.
+  Map<String, dynamic> toJson() => {
+        'repository_info': repositoryInfo.toJson(),
+        'run_details': runDetails.toJson(),
+        'task_info': taskInfo.toJson(),
+        'metrics': metrics.toJson(),
+        'reached_cutoff': reachedCutoff,
+        'config': config.toJson(),
+      };
+}