Propose to add `.gitignore` file to exclude unnecessary files and directories

[tolgacangoz]

First 😋

Congrats on your library!

@mehmetozsoy1

[ozankabak]

Thank you for offering to help. We are still setting up the repository, so these PRs got auto-closed. Starting this week, we will switch over active development to this repository and hope to collaborate with you as we make progress 🚀