Every reachable ranges knob with its kind, description, range or options and, where one value holds
everywhere, its default: the module-wide knobs, how a hovered or clicked band draws, then the labels
along each range's border. Static data, readable with no map loaded.
Remarks
A knob is a plain display value in ReachableRangesModuleConfig, at the path its id names.
Not knobs: beforeLayerConfig, layers and title, which take structured, MapLibre or function
values; and events.
Every reachable ranges knob with its kind, description, range or options and, where one value holds everywhere, its default: the module-wide knobs, how a hovered or clicked band draws, then the labels along each range's border. Static data, readable with no map loaded.