Propose navigation updates

[olearycrew]

Proposing to make the following changes to streamline the left hand nav of the docs and make it a little more compact:

• Reorder the top items to make the Quickstart more prominent and "what's new" less
• Move "Test Workflows" under "write and run workflows" to not have it be a top-level item
• Change "Run flows on dynamic infrastructure" to "Run on dynamic infrastructure" so that it fits on one line in the menu. Ideally, the "flows" in the sentence above and the pages themselves clear up any confusion that this simpler title may create.
• Move all the "Events" related items to a group to decrease the number of items in the left-hand side by 3
• Change Migrate from a top-level group to a smaller group under "Operate" to decrease the prominence of it.

I propose @daniel-prefect reviews this to agree or disagree with any/all of these changes

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• If this pull request adds new functionality, it includes unit tests that cover the changes
• If this pull request removes docs files, it includes redirect settings in mint.json.
• If this pull request adds functions or classes, it includes helpful docstrings.

[olearycrew]

cc @discdiver for review as well

[daniel-prefect]

I recently merged a PR to move the quickstart to the end of this group so that the schedule tutorial shows up next in the logical flow. I think that makes more sense than having the installation page follow.

#16705

[daniel-prefect]

I'm okay with merging the two groups, but if we're going to do this we should also collapse the /v3/deploy/infrastructure-examples and v3/deploy/static-infrastructure-examples folders.

[olearycrew]

Oh wait I meant to do that...

[daniel-prefect]

I'm okay with nixing the top-level Migrate section, but I'd argue that the Prefect 3.0 upgrade guide belongs under Develop (since it's more code focused) and the upgrade agents to workers guide belongs under Operate (since it's more infra focused).

[discdiver]

I like the idea of simplifying the top-level nav. Would be interested to see a preview deployment, but that's not building because of the conflicts in mint.json.