Exact regex implementation isn't specified in the documentation

[mkimi-lightricks]

The documentations about regex doesn't specify the exact regex implementation (dialect or feature set if you want).

Is it posix / perl / basic regex or something else?

[colinwm]

The regex engine is based on this one: https://docs.rs/regex/latest/regex/

[mkimi-lightricks]

Thanks, consider adding this information to the official documentation.

This data is useful for any user that uses the regex in the code search.