maski 0.3.0

Added

• The preview opens with a banner: the command path in the heading color, its
  usage (arguments and flags, verbose left out) and its description in bold,
  then a rule. The description is the blockquote under the heading; an alert
  such as > [!NOTE] is never mistaken for it.
• Code blocks in the preview are framed, with their language in the top
  border, like ┌ bash ──┐. Lines too wide for the panel are cut with … so
  the frame stays intact.
• Code blocks are syntax highlighted (bash, sh, zsh, js, python, lua, ruby,
  php, batch). Other languages stay uncolored.
• examples/langs.md, a sample maskfile with one task per language mask can
  run.
• A release task at the top of examples/maskfile.md that shows every
  element the preview renders in one screen.
• Prebuilt binaries on each GitHub release: static Linux x86_64 and aarch64
  (any distribution), macOS Apple Silicon and Intel. The README explains the
  one-line install.

Changed

• The Nix package for Linux is a static musl binary: its runtime closure is the
  binary alone (5.6 MiB instead of 51.5 MiB). Its store path name now ends with
  -static-x86_64-unknown-linux-musl. macOS is unchanged.
• Code in the preview uses the terminal's default color instead of gray.
• md4x is pinned to v0.0.26, its last release written in C.

Removed

• cargo install maski from the README: the crate is not published on
  crates.io.

Fixed

• Links in the preview no longer show stray characters around their text:
  md4x wraps them in OSC 8 hyperlink sequences that skim cannot display.
• With the preview above or below the list (--preview down, the default, or
  up), a short list no longer leaves a blank gap: the preview takes every row
  the list does not need, and a long list still gets half the screen.