v0.12.0: Now It Emerges

Changes since v0.11.5

• Add initial emerge support.
• Add precompiled binaries:
  • pacaptr-macos-aarch64
  • pacaptr-macos-universal
• Use flags as subcommands (made possible by clap-rs/clap#1974).
  • Add a huge amount of docstrings from pacman(8), greatly improving the readability of help messages.
• Fix/add multiple functionalities for package managers including apk, dnf and zypper.
• Introduce test_dsl! macro to reuse tests from pacapt.
  • Use system shell as the backend of test_dsl!.
  • Add many more smoke tests.