TPI: FastAPI tutorial [part 1]

[luabud]

Refs: #21586

• anyOS @lszomoru
• anyOS @minsa110

Complexity: 3

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We are adding a FastAPI tutorial to our Python docs page (PR). Because it's a fairly large doc to go through, I've broken it down into smaller pieces for the TPIs. You should be able to run through the section defined in this issue without having to read any previous content from the doc.

Steps:

1. Run through the "locally in VS Code" section in the tutorial-fastapi.md file in this PR: Add FastAPI tutorial to Python docs  vscode-docs#6760

Things we're looking for in this TPI:

• Ensure the guidance makes sense and is accurate
• Ensure you get to a successful state at each step
• Any feedback on wording/structure of the tutorial

You can feel free to open issues with problems you find, or comment in the PR directly.

[lszomoru]

It's probably easier to consume the markdown file here, than in the PR view.

[lszomoru]

Went through the "locally in VS Code" section on macOS. Everything worked as expected. I have added some comments to the PR as that seemed the most convenient way to provide feedback directly in the documentation.