Meta-package-manager

- \[mpm\] Automate minor and major version bump.
- \[mpm\] Automate release preparation workflow.
- \[mpm\] Trigger tagging, build and version bump on release event.
- \[mpm\] Add a debug workflow for troubleshooting.

- \[mpm\] Add single manager selector aliases: `--apm`, `--apt`, `--apt-mint`,
`--brew`, `--cask`. `--choco`, `--composer`, `--flatpak`, `--gem`, `--mas`,
`--npm`, `--opkg`, `--pip`, `--snap`, `--vscode` and `--yarn`.
- \[brew,cask\] Thorough cleanup: call `autoremove` commands to remove unused
dependencies and use `--prune=all` to scrub the whole cache.
- \[mpm\] Switch default table rendering to `rounded_outline`.
- \[mpm\] Rely on `click-extra` for table rendering and tests.
- \[mpm\] Remove direct dependencies on `click-log` and `cli-helpers`.
- \[mpm\] Automate post-release version bump.
- \[mpm\] Outsource some workflow definition to external repository.
- \[mpm\] Fix generation of dependency graph.

- \[mpm\] Add `--color`/`--no-color` (aliased to `--ansi`/`--no-ansi`) flags.
- \[mpm\] Forces no color on JSON output.
- \[mpm\] Group commands and options in help screen.
- \[mpm\] Colorize options, choices, metavars and default values in help
screens.
- \[mpm\] Reintroduce coloring of `--version` option.
- \[mpm\] Add dependency on `click-extra`.
- \[mpm\] Use `sphinx-click` to auto-generate CLI documentation.
- \[mpm\] Autofix Markdown content with `mdformat`.
- \[mpm\] Simplify project management by abandoning the dual use of
`main`/`develop` branches.

- \[mpm\] Add help screen coloring.
- \[mpm\] Change documentation theme from classic RTD to furo.
- \[mpm\] Move documentation from `readthedocs.org` to `github.io`.
- \[mpm\] Rewrite documentation from rST to MyST.
- \[mpm\] Add dependency on `cloup`.
- \[mpm\] Removes `click-help-colors` dependency.
- \[mpm\] Run tests on Python 3.10.
- \[mpm\] Add a contribution guide stub in documentation. Closes {issue}`276`.

- \[mpm\] Implements XKCD 1654. Closes {issue}`10`.
- \[mpm\] Add `-x`/`--xkcd` option to forces manager selection.
- \[mpm\] Let `-m`/`--manager` multi-option keep order.

- \[choco\] Add Chocolatey package manager.
- \[mpm\] Skip by default the evaluation of package managers not supported on
the user's platform. Closes {issue}`278`.
- \[mpm\] Add a `-a`/`--all-managers` option to force the evaluation of all
managers.
- \[mpm\] Fix highlighting of substrings in search results.