Show a map with controls styling

A class for the container element.

A container given a class is sized by that class: the fill described under style is left out, since an inline declaration outranks every rule a class carries. A string that names no class, empty or blank, is read as none, and the fill stays.

CSS for the container element.

style is the DOM's word here, not MapLibre's: the map style goes in mapStyle. The two share a name in their own worlds and cannot share one here, and React's meaning wins because this is a React component.

Restated rather than inherited, and style below with it.

Both arrive through the <svg> props this extends, so neither line changes the type. They are written out because these two are the placement contract every published element owes a host (apiShape.test.tsx holds every one of them to it), and a reader should not have to resolve an Omit to find out whether a glyph can be positioned.

Widened past CSSProperties deliberately: ElementStyle admits the --mtya-* custom properties that ARE the theming seam, and the DOM typing does not.