[sc-323687] Feat: Add Cobuild support metadata

[alexandremgo]

Overview

Card: sc-323687

• Marks the api-connect recipe as Cobuild-supported.
• Adds concise component guidance describing its one-request-per-input-row behavior and extracted/paginated output.
• Documents request templating requirements: an endpoint URL and at least one parameter column must be configured.
• Guides authentication configuration:
  • Allows credential to remain unset for unauthenticated APIs.
  • Requires the corresponding preset when a secure authentication type is selected.
  • Clarifies that API-key presets automatically inject the key into the header or query parameter configured by the user, so it must not be added manually to request fields.
• Documents response extraction and the runtime requirements of each pagination mechanism.

Cobuild plugin-recipe support is implemented by dataiku/dip#49952.