HWP Preview plugin for Trina AX

This package contains third-party software only, unchanged:
- rhwp 0.8.7 command-line program (MIT), https://github.com/edwardkim/rhwp/tree/1a76570e833917d15817415a53c09ad61ab3203f
  It statically links Rust crates, the Rust standard library, Skia and Skia's libraries HarfBuzz, libjpeg-turbo,
  libpng, zlib, Wuffs and (Linux) Expat (BSD, MIT, Apache-2.0, Zlib, Unicode, IJG and libpng licences). One function
  of the svg2pdf crate contains code under the Mozilla Public License 2.0; notices/SOURCE-OFFER.txt says where its
  source is.
- Noto Sans KR Regular (SIL Open Font License 1.1).

This software is based in part on the work of the Independent JPEG Group.

notices/THIRD_PARTY_NOTICES.md lists every component with its version and licence; the full licence texts are in
notices/. notices/SOURCE-OFFER.txt says where the exact sources are.
The HWP adapter, input checks and isolation are part of Trina AX core (AGPL-3.0-only).
