Add new language

[itsnotsaved]

This is a request to add sinhala language to all home assistants projects.

Language: Sinhala
Name: සිංහල
Code: si

Projects: https://developers.home-assistant.io/docs/translations

• Frontend
• Backend
• iOS
• Android

Furthermore, i contribute as a translator / proofreader for eg: lineageos, joomla etc projects.
Email: [email protected] | Name: HelaBasa

@robbiet480 can you enable this language to below projects? but do you still maintain them? because i didn't see any details about them on translation docs

https://crowdin.com/project/home-assistant-companion-docs
https://crowdin.com/project/home-assistant-developer-docs

[itsnotsaved]

@bramkragten

[dshokouhi]

@itsnotsaved I have completed this for Android....for iOS file a separate request with that repo directly so they can add you.