🌐 Add Portuguese translation for Tutorial - First Steps

[jessicapaz]

This PR translates the tutorial/first-steps.md and add this page to the mkdocs.yml file.

[codecov]

Codecov Report

Merging #1861 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1861   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          237       239    +2     
  Lines         7078      7079    +1     
=========================================
+ Hits          7078      7079    +1     

Impacted Files	Coverage Δ
fastapi/params.py	100.00% <0.00%> (ø)
fastapi/routing.py	100.00% <0.00%> (ø)
fastapi/encoders.py	100.00% <0.00%> (ø)
fastapi/requests.py	100.00% <0.00%> (ø)
fastapi/exceptions.py	100.00% <0.00%> (ø)
fastapi/applications.py	100.00% <0.00%> (ø)
fastapi/openapi/utils.py	100.00% <0.00%> (ø)
fastapi/openapi/models.py	100.00% <0.00%> (ø)
fastapi/dependencies/utils.py	100.00% <0.00%> (ø)
fastapi/dependencies/models.py	100.00% <0.00%> (ø)
... and 6 more

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[github-actions]

📝 Docs preview for commit 13a4ba7 at: https://5f303c36f5cc1f021cffdd46--fastapi.netlify.app

[cassiobotaro]

Could it be that in the "schema", it would not be the case to put it in italics because it is not a word in Portuguese? Anyway thanks @jessicapaz!

[github-actions]

📝 Docs preview for commit 3f88582 at: https://5f306633848de07a2f493835--fastapi.netlify.app

[github-actions]

📝 Docs preview for commit ae4ee5a at: https://5f30744bf5cc1f0512ffdb96--fastapi.netlify.app

[deniscapeto]

The translation is pretty good, thanks. Could you please find my comments?

There are other translated pages that use the verb "Rodar" instead of "Executar" for the verb "run". I would go with "Executar" as you did.

Example: https://github.com/tiangolo/fastapi/blob/master/docs/pt/docs/index.md

[github-actions]

📝 Docs preview for commit d500a02 at: https://5f7c7e7b5b3f221d9f29868c--fastapi.netlify.app

[deniscapeto]

LGTM

[tiangolo]

Awesome! Thanks for the contribution @jessicapaz ! 🤓 🚀 🍰

And thanks @Kludex , @cassiobotaro , @deniscapeto for the reviews! 🙇 👏 ☕