[FEATURE]Add Automated API Update Workflow

[saimedhi]

Is your feature request related to a problem?

opensearch-php should be inline with OpenSearch api specification.

What solution would you like?

Add an automated API update workflow that uses OpenSearch api specification to run a generator and automatically raise PRs with the changes. This feature will streamline the process of keeping the API up to date and ensure that any updates are efficiently integrated into the codebase.