feat: creates leaderboard repository package

.github/workflows/api_leaderboard_repository.yaml

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+name: api_leaderboard_repository
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  pull_request:
+    paths:
+      - "api/packages/leaderboard_repository/**"
+      - ".github/workflows/api_leaderboard_repository.yaml"
+    branches:
+      - main
+
+jobs:
+  build:
+    uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/dart_package.yml@v1
+    with:
+      dart_sdk: stable
+      working_directory: api/packages/leaderboard_repository

api/packages/leaderboard_repository/.gitignore

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+# See https://www.dartlang.org/guides/libraries/private-files
+
+# Files and directories created by pub
+.dart_tool/
+.packages
+build/
+pubspec.lock

api/packages/leaderboard_repository/README.md

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+# Leaderboard Repository
+
+[![style: very good analysis][very_good_analysis_badge]][very_good_analysis_link]
+[![Powered by Mason](https://img.shields.io/endpoint?url=https%3A%2F%2Ftinyurl.com%2Fmason-badge)](https://github.com/felangel/mason)
+[![License: MIT][license_badge]][license_link]
+
+Leaderboard repository
+
+## Installation 💻
+
+**❗ In order to start using Leaderboard Repository you must have the [Dart SDK][dart_install_link] installed on your machine.**
+
+Install via `dart pub add`:
+
+```sh
+dart pub add leaderboard_repository
+```
+
+---
+
+## Continuous Integration 🤖
+
+Leaderboard Repository comes with a built-in [GitHub Actions workflow][github_actions_link] powered by [Very Good Workflows][very_good_workflows_link] but you can also add your preferred CI/CD solution.
+
+Out of the box, on each pull request and push, the CI `formats`, `lints`, and `tests` the code. This ensures the code remains consistent and behaves correctly as you add functionality or make changes. The project uses [Very Good Analysis][very_good_analysis_link] for a strict set of analysis options used by our team. Code coverage is enforced using the [Very Good Workflows][very_good_coverage_link].
+
+---
+
+## Running Tests 🧪
+
+To run all unit tests:
+
+```sh
+dart pub global activate coverage 1.2.0
+dart test --coverage=coverage
+dart pub global run coverage:format_coverage --lcov --in=coverage --out=coverage/lcov.info
+```
+
+To view the generated coverage report you can use [lcov](https://github.com/linux-test-project/lcov).
+
+```sh
+# Generate Coverage Report
+genhtml coverage/lcov.info -o coverage/
+
+# Open Coverage Report
+open coverage/index.html
+```
+
+[dart_install_link]: https://dart.dev/get-dart
+[github_actions_link]: https://docs.github.com/en/actions/learn-github-actions
+[license_badge]: https://img.shields.io/badge/license-MIT-blue.svg
+[license_link]: https://opensource.org/licenses/MIT
+[logo_black]: https://raw.githubusercontent.com/VGVentures/very_good_brand/main/styles/README/vgv_logo_black.png#gh-light-mode-only
+[logo_white]: https://raw.githubusercontent.com/VGVentures/very_good_brand/main/styles/README/vgv_logo_white.png#gh-dark-mode-only
+[mason_link]: https://github.com/felangel/mason
+[very_good_analysis_badge]: https://img.shields.io/badge/style-very_good_analysis-B22C89.svg
+[very_good_analysis_link]: https://pub.dev/packages/very_good_analysis
+[very_good_coverage_link]: https://github.com/marketplace/actions/very-good-coverage
+[very_good_ventures_link]: https://verygood.ventures
+[very_good_ventures_link_light]: https://verygood.ventures#gh-light-mode-only
+[very_good_ventures_link_dark]: https://verygood.ventures#gh-dark-mode-only
+[very_good_workflows_link]: https://github.com/VeryGoodOpenSource/very_good_workflows

api/packages/leaderboard_repository/analysis_options.yaml

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+include: package:very_good_analysis/analysis_options.5.1.0.yaml

api/packages/leaderboard_repository/lib/leaderboard_repository.dart

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+/// Leaderboard repository
+library leaderboard_repository;
+
+export 'src/leaderboard_repository.dart';

api/packages/leaderboard_repository/lib/src/leaderboard_repository.dart

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+/// {@template leaderboard_repository}
+/// Leaderboard repository
+/// {@endtemplate}
+class LeaderboardRepository {
+  /// {@macro leaderboard_repository}
+  const LeaderboardRepository();
+}

api/packages/leaderboard_repository/pubspec.yaml

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+name: leaderboard_repository
+description: Leaderboard repository
+version: 0.1.0+1
+publish_to: none
+
+environment:
+  sdk: ">=3.0.0 <4.0.0"
+
+dev_dependencies:
+  mocktail: ^1.0.0
+  test: ^1.19.2
+  very_good_analysis: ^5.1.0

api/packages/leaderboard_repository/test/src/leaderboard_repository_test.dart

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+// ignore_for_file: prefer_const_constructors
+import 'package:leaderboard_repository/leaderboard_repository.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('LeaderboardRepository', () {
+    test('can be instantiated', () {
+      expect(LeaderboardRepository(), isNotNull);
+    });
+  });
+}