de-hardcode sch and led enumeration types from .html
publish raw type & pretty-string from .cpp indexed settings
de-fpstr string view references, use the object directly
publish 'faulty' schedule specs indexes, focus & report elems
ref. #2626
should fix faulty enum<->number references in selects
ref. #2628 - schedule types were numeric, while websocket delivered strings
remove leftover manual template merge, idForContainer() should just use template-id data key
group add event now checks that instead, raising alert when number is greater than max
ref. #2610
* migrate to esbuild from terser, since now js source needs bundling
* (temporary?) hijack inline-source object handling to inline html files
* get rid of legacy removeIf comments in source in favour of explicit
removal either through bundling tree-shaking and / or manual module-*
class element removal w/ jsdom
* get rid of multi-layered custom checkboxes in favour of
`appearance: none` directly styling the `input` elem
also removes scripting part that was supposed to adjust for=... labels
* update to html-minifier-terser, up-to-date html-minifier fork
* update to iro.js 5.5.x, using npm to manage dependencies
* build script can now update resulting html output
(called after bundling stage, before minification)
