feat: article about pipx

knowledge base/pipx.md

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+# Pipx
+
+Tool to help install and run end-user applications written in Python.
+
+It acts as a package manager using [`pip`][pip] behind the scenes, but is focused on installing and managing Python packages that can be run from the command line directly as applications.
+
+The `install` command automatically creates a Python virtual environment, installs the package, and adds the package's associated applications (entry points) to a location in PATH. For this reason, `pipx` never needs to run as `root`.<br/>
+For example, `pipx install 'pycowsay'` makes the `pycowsay` command available globally, but sandboxes the package in its own virtual environment.
+
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+
+## TL;DR
+
+```sh
+# Installation.
+python3 -m pip install --user 'pipx'
+brew install 'pipx'
+
+# Add pipx's binary folders to PATH.
+pipx ensurepath
+python3 -m pipx ensurepath
+
+# Install applications.
+pipx install 'ansible'
+
+# List installed applications.
+pipx list
+
+# Run applications *without* installing them globally.
+pipx run 'xkcdpass'
+pipx run --spec 'package' 'app_with_different_name_in_the_package'
+pipx run 'yamllint==1.31.0'
+
+# Upgrade single applications.
+pipx upgrade 'pip-autoremove'
+
+# Upgrade all installed applications.
+pipx upgrade-all
+```
+
+## Further readings
+
+- [Website]
+- [Pip]
+
+<!--
+  References
+  -->
+
+<!-- Upstream -->
+[website]: https://pypa.github.io/pipx/
+
+<!-- Knowledge base -->
+[pip]: pip.md