v0.91.1: restore the admin-sheet classes 0.91.0 dropped

0.91.1

Fixed

• The shipped admin sheet restores the nineteen class rules 0.91.0 silently dropped
  (#12). The sheet compiles from Tailwind
  scanning cairn's own source, and the 0.91.0 window migrated cairn's tree off the named type
  steps onto the grammar roles, so Tailwind tree-shook the newly unused utilities out of the
  compiled sheet: text-sm, text-xs, text-lg, text-base, text-2xl, text-3xl, gap-6,
  tracking-tight, badge-ghost, and ten bracketed arbitrary sizes (text-[0.625rem] through
  text-[1.0625rem]). Consumer admin markup resolves its classes from that sheet, so markup
  riding any of the nineteen rendered unstyled on 0.91.0 while the upgrade guide promised no
  rendering change. All nineteen are back through a labeled compatibility safelist in the sheet's
  compile input, and the sheet's class inventory is now a gated contract: a snapshot test diffs
  the built sheet's inventory against a committed snapshot, so a class can leave the shipped
  sheet only as a deliberate, changelog-carried act.

  Consumers must: nothing, coming from 0.90.1 or earlier; the sheet again carries every class
  it did there. Coming from 0.91.0, upgrade and any custom admin markup that lost its styling
  (most commonly text-sm) styles again with no markup change.