Document & Blog about pipx

[adriens]

❔ Context

In a few words, tell why you did create the issue that does not match already existing templates.

https://github.com/pypa/pipx

🎯 Target

Explain what do you expect from this issue.

• Make install process even easier
• Discover pipx
• See if we can enhance install scenarios

⚠️ Risks

What are the risks if we don't implement this issue.

• not being aware of how people package Python apps