fix(api): fixes #5412. Updates API landing pages to include Management API for Cloud Dedicated and descriptions of v1 and v2 APIs for each product.
- Adds a custom short title field in OpenAPI info.
- Uses the new field for nav menu item names.
- Adds identifiers to avoid duplicate name warnings.
- Cleans up variation in frontmatter.
fix(api): fixes #5412. Updates API landing pages to include Management API for Cloud Dedicated and descriptions of v1 and v2 APIs for each product.