Merge remote-tracking branch 'upstream/master'

# Conflicts:
#	lib/main.dart
#	lib/utils/routes.dart

.github/workflows/greetings.yaml

@@ -0,0 +1,16 @@
+name: Greetings
+
+on: [pull_request_target, issues]
+
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+    - uses: actions/first-interaction@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        issue-message: "Hi there! Thanks for opening this issue. We appreciate your contribution to this open-source project. We aim to respond or assign your issue as soon as possible."
+        pr-message: "Welcome to Our repository.🎊 Thank you so much for taking the time to point this out."

CONTRIBUTING.md

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+# **Contributing Guidelines** 📄
+
+This documentation contains a set of guidelines to help you during the contribution process.
+We are happy to welcome all the contributions from anyone willing to improve/add new scripts to this project.
+Thank you for helping out and remember, **no contribution is too small.**
+<br>
+Please note we have a [code of conduct](CODE_OF_CONDUCT.md)  please follow it in all your interactions with the project.
+
+
+
+<br>
+
+## **Need some help regarding the basics?🤔**
+
+
+You can refer to the following articles on basics of Git and Github and also contact the Project Mentors,
+in case you are stuck:
+
+- [Forking a Repo](https://help.github.com/en/github/getting-started-with-github/fork-a-repo)
+- [Cloning a Repo](https://help.github.com/en/desktop/contributing-to-projects/creating-an-issue-or-pull-request)
+- [How to create a Pull Request](https://opensource.com/article/19/7/create-pull-request-github)
+- [Getting started with Git and GitHub](https://towardsdatascience.com/getting-started-with-git-and-github-6fcd0f2d4ac6)
+- [Learn GitHub from Scratch](https://docs.github.com/en/get-started/start-your-journey/git-and-github-learning-resources)
+
+<br>
+
+## **Issue Report Process 📌**
+
+1. Go to the project's issues.
+2. Give proper description for the issues.
+3. Don't spam to get the assignment of the issue 😀.
+4. Wait for till someone is looking into it !.
+5. Start working on issue only after you got assigned that issue 🚀.
+
+<br>
+
+## **Pull Request Process 🚀**
+
+1. Ensure that you have self reviewed your code 😀
+2. Make sure you have added the proper description for the functionality of the code
+3. I have commented my code, particularly in hard-to-understand areas.
+4. Add screenshot it help in review.
+5. Submit your PR by giving the necesarry information in PR template and hang tight we will review it really soon 🚀
+
+<br>
+
+# **Thank you for contributing💗** 

lib/cubit/index_cubit.dart

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+import 'package:flutter_bloc/flutter_bloc.dart';
+
+class IndexCubit extends Cubit<int> {
+  IndexCubit() : super(0);
+
+  void changeIndex(int newIndex) {
+    emit(newIndex);
+  }
+}