Add a new validate config WS command

[balloob]

Breaking change

Proposed change

This adds a new websocket command to validate configuration for triggers, conditions and actions.

This allows us to give better feedback in the frontend without triggering errors in the logs.

Docs home-assistant/developers.home-assistant#1223

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

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• This PR fixes or closes issue: fixes #
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[probot-home-assistant]

Hey there @home-assistant/core, mind taking a look at this pull request as it has been labeled with an integration (websocket_api) you are listed as a code owner for? Thanks!
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[MartinHjelmare]

Please add the ignore error code when ignoring a type error.

[balloob]

#67311