fix(naming): config fix round 1 -- unknown sections, O(n) accumulate

F1: test_unknown_key_is_reported_not_fatal never asserted unknown_keys
itself, only that parsing survives -- a no-op accumulator passed it.
Now asserts the key is actually collected.

F2: a misspelled section name, e.g. [deafults], was silently discarded --
Ok empty, lang and everything else gone, nothing reported. That is the
highest-value typo this feature exists to catch. Any section other than
[defaults] is now collected into a new Config.unknown_sections, kept
separate from unknown_keys so the CLI can word the two warnings
differently. Still non-fatal: a newer colitur's added section must not
break an older binary.

F3: overlays and unknown_keys accumulated with '@ [v]' per line, O(n^2)
over the field count. Cons during the fold, List.rev once at the end.

F4: documented that lang/template/format are last-wins on a repeated
key, the opposite direction from Overlay_ini.get's first-wins over the
same section type.

0 files changed, 0 insertions, 0 deletions