rust-status: add missing variants to `Dispatch` enum Differential Revision: https://phab.mercurial-scm.org/D8088

rust-status: rename `StatusResult` to `DirstateStatus` "Result" has a special meaning in the Rust world, this should be clearer. Differential Revision: https://phab.mercurial-scm.org/D8087

rust-status: refactor options into a `StatusOptions` struct Differential Revision: https://phab.mercurial-scm.org/D8086

rust-status: add util for listing a directory I debated moving it to utils, but it is not used anywhere else for now, and its skip behavior is pretty specific to status. Differential Revision: https://phab.mercurial-scm.org/D7927

rust-matchers: add `IgnoreMatcher` This is a big change but all of the pieces call each other, so it makes sense to have this all in one patch. Differential Revision: https://phab.mercurial-scm.org/D7925

rust-matchers: add `build_regex_match` function This function will be used to help build the upcoming `IncludeMatcher`. Differential Revision: https://phab.mercurial-scm.org/D7924

rust-matchers: add functions to get roots, dirs and parents from patterns These functions will be used to help build the upcoming `IncludeMatcher`. Differential Revision: https://phab.mercurial-scm.org/D7923

rust-matchers: add function to generate a regex matcher function This function will be used to help build the upcoming `IncludeMatcher`. While Re2 is still used and behind a feature flag, this function returns an error meant for fallback in the default case. Differential Revision: https://phab.mercurial-scm.org/D7922

run-tests: restrict Rust thread pool to 3 threads during tests Differential Revision: https://phab.mercurial-scm.org/D8270

nodemap: make sure the nodemap docket is updated after the changelog It is better to have a lagging nodemap than a nodemap pointing to node that does not exists yet. (strictly speaking, the order was already right, however we make it more explicit). Differential Revision: https://phab.mercurial-scm.org/D8188