[build] Add fastlane for Android project

[wax911]

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https://github.com/AniTrend/anitrend-v2/issues?q=is%3Aissue+is%3Aclosed

Feature Information

We would like to add fastlane to our Android project to streamline and automate the build and release process. Fastlane is already set up in the AniTrend/anitrend-app repository, and it includes actions for managing various tasks. We aim to replicate and possibly enhance this setup for the AniTrend/anitrend-v2 repository.

Solution Information

1. Setup fastlane:

   • Create a fastlane directory in the project root if it does not already exist.
   • Add Fastfile and Appfile to the fastlane directory. These files should define the lanes and configuration for the project.
   • Ensure the necessary fastlane plugins and gems are included in the Gemfile.

2. Define lanes:

   • Replicate the lanes defined in the AniTrend/anitrend-app repository's Fastfile. These might include lanes for building, testing, and releasing the app.
   • Customize the lanes as needed for the AniTrend/anitrend-v2 repository.

3. Integrate with GitHub Actions:

   • Set up GitHub Actions workflows to trigger fastlane lanes. This should include workflows for continuous integration (CI), continuous deployment (CD), and any other automation tasks.
   • Reference the existing setups and actions from the AniTrend/anitrend-app repository as a guide.

4. Documentation:

   • Document the fastlane setup and usage in the repository's README or a dedicated fastlane documentation file.
   • Include instructions on how to run fastlane commands locally and how to troubleshoot common issues.

Additional Context

Refer to the existing fastlane setup in the AniTrend/anitrend-app repository for guidance and best practices. The current setup includes actions for building the app, running tests, and managing releases, which can be adapted for AniTrend/anitrend-v2.