Add Sinhala Language

[nukeador (Rubén Martín [❌ taking a break from Mozilla])]

Hi there and welcome to the Common Voice community!

Have you checked our readme already? Please, feel free to ask any questions about the process described there:

Readme: How to see my language on Common Voice

This information is also now available on the About Pages on Common Voice Website. Please help us to localise this by joining Pontoon Mozilla Voice Community Playbook: The source of truth for setting up and maintain self-sustainable communities. Hello everyone, I would like to open this topic to summarize some of the most asked question we are getting: How do I get my language in Common Voice. There are three steps to have your language ready: …

Thanks!