Fonts from local storage

* `style-microg-sattelite-*.json` is the same, but with a sattelite layer (no openmaptiles variant, because openmaptiles does not specify a sattelite layer). **TODO: create these.**

* `sprite_sources` files can be generated to a single sprite file as found in the app's assets using `spreet` (see below).

* **TODO: remove references to mapbox for fonts.**

* PBF files for fonts can be generated using `build_pbf_glyphs` from the `fonts` folder.

## Resources

        }

    },

    "sprite": "asset://sprites",

    "glyphs": "mapbox://fonts/microg/{fontstack}/{range}.pbf",

    "glyphs": "asset://{fontstack}/{range}.pbf",

    "layers": [

        {

            "id": "background",