notofonts/masaram-gondi ? reverse-engineered prompt

Build me the Noto Masaram Gondi font project so it can produce the finished font files, run the quality checks, and generate proof pages for reviewing the glyphs.

I want the repo to work smoothly on a normal machine, with a simple way to build everything, test it, and see the results in a browser. If anything needs to be checked against the latest font build docs or FontBakery guidance, look it up online and use the current approach.

Please make sure the build output is reliable, the tests catch obvious font problems, and the proof files are easy to open and inspect. Keep the setup straightforward, and if there are any missing pieces in the repo, fill them in so the project feels complete and ready to maintain.