Add monarch distributed tutorial

[amirafzali]

Description

This adds a tutorial demonstrating how to use Monarch with TorchTitan to spin up distributed jobs from a single controller.

We would like to link to this as part of the Monarch pytorch.org blog post.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3613

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

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As of commit 3a7f607 with merge base 3469d47 ():
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[dcci]

Approved, but please wait for @svekars to take a look at the comment in case she has anything.

[svekars]

Added a couple of minor comments but LGTM overall.
One question - we don't want this to be executable, right? and have a notebook?

[amirafzali]

Added a couple of minor comments but LGTM overall. One question - we don't want this to be executable, right? and have a notebook?

Thanks for the quick review! Addressed your feedback. There's a notebook linked at the bottom of the tutorial