Fixing some bugs/lint

Thanks to @blehrer for making the extension's layout detection compatible with ergodox/planck geometries and their complex customizations.

Also added some QOL improvements in a few places.

Full Changelog: https://github.com/nivekmai/oryx-build-extension/compare/0.0.5...0.0.6

A resolution for #1, adding the ability to configure the layout via the options instead of forcing reliance on the URL.

URL support is still possible by not configuring the layout option, and URL support has been bolstered via slugging.

**Full Changelog**: https://github.com/nivekmai/oryx-build-extension/compare/0.0.4...0.0.5