Changes in version 0.1.0                        

  - Initial release.

  - Get Started and glyco-regex syntax vignettes introduce structural
    queries through biological examples.

  - New rex_compile() validates and compiles reusable glycan patterns
    with residue classes, linkage constraints, branches, repetition,
    anchors, lookaround, and named captures.

  - New rex_count() and rex_detect() count and detect structural
    matches. Query functions accept glycan strings in any format
    supported by glyparse::auto_parse(), including mixed-format vectors,
    as well as glyrepr_structure vectors and glyrepr-compatible igraph
    objects.

  - New rex_extract() and rex_extract_all() return matching glycan
    fragments while preserving reducing-end anomeric information.

  - New rex_locate() and rex_locate_all() identify the nodes and edges
    of structural matches.

  - New rex_match() and rex_match_all() return structural matches and
    named captures.

  - New rex_subset() and rex_which() select matching glycans or their
    indices.