New tech guides and updated error definitions (March 2, 2022)

Several pages have received updates including error codes, a deprecation guide, and documentation for link-based pagination.

• Error code 704 has been added to error definitions. This error is returned if using the /payment-networks endpoint with an account that doesn't support payment-networks. Data Access API errors

• A new reference page lists deprecated items. Deprecation history

• A new tech guide explains link-based pagination. Link-based pagination