Merge the automatically install apps guide w/ Fleet-maintained apps guide

[marko-lisica]

UPDATE: @noahtalerman: Instead of merging, I made some improvements to these guides. I made the "Deploy software" guide the landing page which links to other guides. PR is here: #23329

---

Problem

Today app management guides are separate, and we're moving towards having affordance that makes automatic install policy automatically. We want to have one guide explaining all kind of apps Fleet supports + how to trigger install automatically, so that there’s one place for the user to go to know how app management works.

Solution

Merge these 2 into one guide and make redirects from old URLs to the new one:

• https://fleetdm.com/guides/automatic-software-install-in-fleet
• https://fleetdm.com/guides/install-fleet-maintained-apps-on-macos-hosts

[noahtalerman]

@marko-lisica I made some improvements to these guides this morning. I didn't merge them but I made the "Deploy software" guide the landing page which links to other guides. PR is here: #23329

Do you think that addresses the problem?

[marko-lisica]

@noahtalerman This looks good to me. I think it addresses the problem.

[noahtalerman]

Noah: I made some improvements to these guides this morning. I didn't merge them but I made the "Deploy software" guide the landing page which links to other guides. PR is here: #23329

Marko: This looks good to me. I think it addresses the problem.

Closing this issue.

[fleet-release]

Unified guides merge,
Apps managed, seamless surge,
Ease for users emerges.