Documentation page: add links to Yellow and SkyConnect docs

[c0ffeeca7]

• attempt to make it easier to find Yellow and SkyConnect documentation
• add links to Documentation menu in navigation bar
• add links in aside

Proposed change

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logo's and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase:
• Link to parent pull request in the Brands repository:
• This PR fixes or closes issue: fixes #

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

[agners]

Background: This came from Support side: People seem to have a hard time to find documentation when they are on the product pages (/skyconnect or /yellow).

However, I don't think they should be that prominent in the documentation section. Maybe we can make it otherwise clear that they are still on the home-assistant.io website, and documentation for these things is to be found elsewhere.

[frenck]

I do get the idea, and understand the issue. I do think this might not be the best place. Mostly, because this is now a main menu item navigating away from the website, which is (IMHO) very confusing.

[c0ffeeca7]

Good point. I see the concern. Can we agree to keep the links in the aside?