Conflicts resolved keeping both sides: `.sketch` stays in `is_document`
(now via `OsStr::to_str`); ROADMAP and the parity, roadmap and
file-format docs keep main's headers and rows with the `.sketch` notes
and history rows added.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* Dev profile: line tables for workspace crates, no debug info for dependencies
* Tests: one integration-test binary per crate with several test files
* xtask ci: nextest, doctests, tests without examples, --keep-going; add xtask test
bflatastic