[WIP] Add more functions to lovelace ws

[bramkragten]

WIP

Description:

Adds more functions to the websocket for lovelace. This should complete the functions for the cards. Next up are the views.

TODO:

Test and add tests

Related issue (if applicable): fixes #

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#<home-assistant.io PR number goes here>

Example entry for configuration.yaml (if applicable):

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[balloob]

We should not support this. People can move individual cards but shouldn't be able to do many cards at once.

[bramkragten]

The idea was that you would get the config of the view, without the cards, and could edit the name and icon, etc. But that was for a different PR, so should not have been in here...

[balloob]

Good point. We should make a update command for view, but it should exclude cards then.

[balloob]

Code review would be a lot easier if you either have a single commit per WS command, so it's easy to review. Or if you do a PR per command.

[bramkragten]

Will do, tomorrow night I'll have time to work on it.

[bramkragten]

Should we rename set to update, maybe it is clearer?

[balloob]

I like update.

[bramkragten]

Closing for #17730