Feature guide with table of contents: one line per feature plus how to
enable and use it. Covers zones, groups, multiple canvases, style,
floor plan, scanner, zigbee/zwave import, device inventory, live status,
export, live view, gethomepage, MCP, settings.
Untrack FEATURES.md (was ignored as internal meta) now that it ships as
public docs.
ha-relevant: no
Pouzor