refactor: migrate to stacked architecture.

* feat: mostly done stacked architecture.

* refactor: migration to stacked architecture.

lib/services/github_api.dart

@@ -0,0 +1,43 @@
+import 'package:github/github.dart';
+import 'package:injectable/injectable.dart';
+
+@lazySingleton
+class GithubAPI {
+  var github = GitHub();
+
+  Future<String?> latestRelease(String org, repoName) async {
+    var latestRelease = await github.repositories
+        .getLatestRelease(RepositorySlug(org, repoName));
+    var dlurl = latestRelease.assets?.first.browserDownloadUrl;
+    return dlurl;
+  }
+
+  Future latestCommitTime(String org, repoName) async {
+    var repo =
+        await github.repositories.getRepository(RepositorySlug(org, repoName));
+
+    var commitTime = repo.pushedAt?.difference(
+      DateTime.now().toLocal(),
+    );
+
+    final hours = commitTime!.inHours.abs();
+
+    if (hours > 24) {
+      var days = (commitTime.inDays).abs().toString();
+      return "$days days";
+    } else if (hours > 1 && hours < 24) {
+      var hours = (commitTime.inHours).abs().toString();
+      return "$hours hours";
+    } else {
+      var minutes = (commitTime.inMinutes).abs().toString();
+      return "$minutes mins";
+    }
+  }
+
+  Future contributors(String org, repoName) async {
+    var contributors =
+        github.repositories.listContributors(RepositorySlug(org, repoName));
+    contributors.forEach((contributor) {});
+    return contributors;
+  }
+}