Added Bulgarian translation.

[marinoffDev]

🤔 This is a

• [ ] Feature
• [ ] Bug
• [x] Documentation Update
• [ ] Translation

✍ Description

• Write a short description I sat down with some nice tunes and translated everything in the readme to bulgarian :)

Added to documentation

• [x] readme file
• [ ] No documentation needed

🐱‍💻 Use a meme/gif to describe how you feel for contributing (optional)

https://ibeantravelling.files.wordpress.com/2019/12/img_1684.gif

[marinoffDev]

Whoops :) Accidentally selected Main branch. I changed it to 'developer' now. Hope that's okay!

[muchirijane]

It's okay 🥇