Adds static location share a la [MSC3488](https://github.com/matrix-org/matrix-doc/pull/3488) behind a labs flag, supporting legacy `m.location` `msgtype` too. Powered by https://github.com/matrix-org/matrix-react-sdk/pull/7135. Adds maplibre as a dependency. To make this work, you have to add a valid `map_style_url` to your config.json.