Move profiling manual section to a new tutorials toplevel heading

[LilithHafner]

This creates a new "Tutorials" section to contain the tutorial-esque content scattered throughout the existing documentation. This section may be moved to a separate repo in the future to ease maintenance.

Organization inspired both by https://diataxis.fr/ and by the desire to make it easier to contribute to Julia documentation. Some documentation PRs receive pushback for being too tutorialy, and this would provide an alternative avenue for those contributors.

[c42f]

I'm kinda surprised by how simple this turned out to be.

I think we should do it!

• We need a proper place for tutorials so tutorial-like PRs don't get rejected and so that people can write actual tutorials content with the correct audience in mind.
• This tutorial for a stdlib doesn't fit under the Manual heading which largely contains language-related content

[KristofferC]

We need a proper place for tutorials so tutorial-like PRs don't get rejected and so that people can write actual tutorials content with the correct audience in mind.

I don't think the manual for the language is the right place for this though. There is an almost unbounded number of tutorials that can be written (as shown by https://julialang.org/learning/tutorials/). Are you saying that these tutorials ideally should be in the language manual?

[LilithHafner]

Some tutorials (e.g. this tutorial for how to launch the repl) do belong on the docs.julialang.org page. I do agree, however, that it would be nice, where it makes sense, to splice out these essential tutorials from more formal and less newbie-friendly content to leave the manual more specification/reference like without loosing the utility of docs.julialang.org to help new users. Hence the tutorials section to put them in and link to them.