Proposed change

Enable local query for google_assistant, the functionality is identical to cloud query, so adding the functionality only requires updating the JavaScript that runs on the assistant devices and configuration change.

Also a fix to remove onProxySelected. This change was the only way I could make google_assistant local fulfilment work on any of my devices, but I would like to see others results with this. Two years ago this seemed to be a requirement, but none of Google's own docs or examples use it anymore.

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.

This is a little unclear which type of change because code is included in this documentation.
I would like to longer term look at serving the JavaScript from Home Assistant itself. That will result in easier setup for users (just setting a URL in the Google Assistant developer panel, rather than uploading code) and more importantly code living with code not documentation.

Additional information

This builds on home-assistant/core#63218

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.