DEVDOCS-5575 [update]: Catalog API, categories

[bc-andreadao]

DEVDOCS-5575

What changed?

• Mark deprecated Categories endpoint, add to Sunsets & Deprecations page
• Mark (main undeprecated) Categories endpoint as the primary endpoint to use
• Change sidebar dividers to the following in the draft screenshot (divider may end up being alphabetical)

• Fixed: Get a Category Tree should be under Category Trees divider

Release notes draft

• Categories endpoint under the Catalog API helps you to manage Categories, in replace of deprecated Categories endpoint.

Relevant PR

• PR 752 -- dev center PR for sidebar

Other slack conversation

[slsriehl]

• Don't restructure the files. They are organized by endpoint URL and should remain as such.
• Add a callout to the top of each deprecated endpoint naming and linking to the preferred endpoint -- see Customers V2.
• Continue to finesse the tags, that's great.
• We'll talk about URLs and navigation strategy.

[slsriehl]

This looks gtg from my pov. proceed with anyone on DX Platform!