Add suggested tool '7zip' to documentation
This adds a note to `docs/cli.rst` in the section on the `--external`
flag that suggests use of the "7-zip" extractor, and links to the
7-zip website and to package managers that can install it.
@@ -223,7 +223,15 @@ are described here:
Specify external 7zip command path. By default, aqt uses py7zr_ for this task.
+ In the past, our users have had success using 7-zip_ on Windows, Linux and Mac.
+ You can install 7-zip on Windows with Choco_.
+ The Linux/Mac port of 7-zip is called ``p7zip``, and you can install it with brew_ on Mac,
+ or on Linux with your package manager.
+
.. _py7zr: https://pypi.org/project/py7zr/
+.. _7-zip: https://www.7-zip.org/
+.. _Choco: https://community.chocolatey.org/packages/7zip/19.0
+.. _brew: https://formulae.brew.sh/formula/p7zip
.. option:: --internal
