Map card: support additional YAML options

This release improves oref-alert-map configuration flexibility by forwarding additional YAML map-card options to Home Assistant’s underlying map card. Unknown keys are now passed through, while this card still enforces its core fields (type, geo_location_sources, fit_zones) and computes entities and auto_fit. More information is available here.

Full Changelog: v6.15.3...v6.16.0