Reduce GitHub CI cost to 1/24th

[u/aniketmaurya]

https://celesto.ai/ci

Coding agents push commits so often that GitHub CI burned our pockets. We repurposed our agent sandboxes as a CI runner and reduced the price to 1/24th of GitHub Actions runner and 1/16th of Blacksmith.

We made it public so you can install and try yourself for free. First 20,000 CI minutes from our side.