Move to murena infra
Description
This removes all our dependencies on Cloudflare and specifically, my personal R2 bucket that was backing our tiles.
This also switches the app to use Stadia Maps by default if an API key is provided at build time.
To deploy, merge and add our Stadia Maps API key as a secret in CI/CD settings, exposed as the environment variable "STADIA_KEY". Then you can tag the most recent commit in main with a tag of the form v0.0.0. Since this is a new feature, it should at the very least increment the minor version. Push this tag to main and the build will proceed automatically and a release will be created. Obtainium clients will automatically download the new version and users will be able to install it at their convenience.