Additional bundled dependency licenses

@mantine/hooks 8.3.2 (MIT)
The npm package declares MIT but omits the license text. The accompanying
mantine-hooks-LICENSE.txt is copied verbatim from its upstream release:
https://github.com/mantinedev/mantine/blob/8.3.2/LICENSE

The other bundled dependencies are documented in ../THIRD-PARTY-NOTICES.txt,
generated by Vite from the packaged frontend build. It is present only in
builds that ship the compiled application; the WordPress.org connector does
not include it.

These notices apply to builds that ship the compiled Barcode Man application.
The WordPress.org build is a connector and ships no bundled dependency; the
files here are kept so every distribution carries the same license texts.
