[FEATURE] x AI - model actions after OpenAI chat actions

[malexanderlim]

@lcaresia in #14667 (comment) you worked on the x AI actions - these should be updated to include the optional props as well - please see https://pipedream.com/apps/openai/actions/chat as a model for these.

If you can also include a new action - Create Embeddings https://docs.x.ai/api/endpoints#create-embeddings that would be great.

Thanks!

[vunguyenhung]

Hi everyone, all test cases are passed! Ready for release!

Test report
https://vunguyenhung.notion.site/FEATURE-x-AI-model-actions-after-OpenAI-chat-actions-154bf548bb5e81b59d98fbc7f4057724