Reorganise the docs: how it fits together, three complete references, and every page checked against the code
New pages: How It Fits Together (the map of templates, values, repeats and tools), Placeholder Reference (every step with an example and what it does with an empty value), and Repeat Reference (every for_each_from key, which filters each source reads, what each copy is given). Configuration Reference now covers every key with an example. Using Templates lists every card key up front, rebuild_on included. The how-to pages link into the references instead of keeping their own tables, and the wrong claims found checking them against the code are fixed: variables as a mapping is accepted, labels reads only the entity's own, exclude as a mapping matches all of its filters, round keeps trailing zeros only inside text, and more.
From discussion #310.
List entries (with:, repeat:, item templates) and values for a whole dashboard, for v2.3.0
v2.0.0: list edits, new steps, debug report, the thirty new features, with screenshots
v1.11.0: repeating sections and badges, section per copy, allowed dropdown, columns hint