Add a separate sidebar section for labs and demo environments

[ptgott]

Details

See #12787

Currently, the docs/getting-started section of the docs includes guides on deploying the Auth/Proxy Services to a live infrastructure as well as guides based on local labs/demo environments. Let's consider adding a separate sidebar section, "Try Teleport", for the labs/demo environments, and devoting the existing section to choosing an edition and deploying the Auth/Proxy for the first time.

Benefits:

• People first visiting the docs (and first hearing about Teleport) have a quick way to identify the guides they need to get their first glimpses of Teleport's functionality.
• People who need a refresher on launching the Auth/Proxy in their edition of choice don't need to scroll past content related to trying out Teleport for the first time.

Category

• Improve Existing

[ptgott]

This is finished