Add translations for bulgarian (bg-bg)

[lachezar-gizdov]

Is your feature request related to a problem? Please describe.
Not a problem.

Describe the solution you'd like
Add Bulgarian language to the Alexa Media Player project in Lokalise in order for me to add the translations.

[github-actions]

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[danielbrunt57]

I managed to get into the Alexa Media Player project in Lokalise but when I try to add bg, bg_BG, I get No access to resource. Maybe another contributor can give it a try...