Add xAI conversation integration

[dwardu89]

Proposed change

Added the x AI Conversation agent, it is the initial release and uses the same approach to OpenAI since it is compatible. It was created as a separate integration for the eventuality of x AI creating their own library.

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)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This is a new integration, so there aren't fixes to anything else

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.

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

• Documentation added/updated for www.home-assistant.io

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

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[home-assistant]

Hi @dwardu89

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[home-assistant]

Hey there @joostlek, mind taking a look at this pull request as it has been labeled with an integration (analytics_insights) you are listed as a code owner for? Thanks!

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[MartinHjelmare]

Please add a quality scale file instead. New integrations require Bronze tier:

https://developers.home-assistant.io/docs/core/integration-quality-scale/

https://developers.home-assistant.io/docs/core/integration-quality-scale/#keeping-track-of-the-implemented-rules

[joostlek]

I will close this PR as no CLA has been signed since the creation of this PR so this PR isn't actionable. Please sign it and feel free to pick up once you are ready again.