Barbara Czyż

# Description Add improvements to the retention policy docs so that they match SDK documentation and samples. Preview: https://staging.developer.box.com/reference/resources/retention-policy/ https://staging.developer.box.com/reference/resources/retention-policy--base/ https://staging.developer.box.com/reference/resources/retention-policy-assignment--base/ https://staging.developer.box.com/reference/get-retention-policies-id/ https://staging.developer.box.com/reference/get-retention-policy-assignments-id/ https://staging.developer.box.com/reference/resources/retention-policies--mini/ Fixes DDOC-684

# Description Added shield information barrier api documentation as specified in: https://cloud.app.box.com/notes/934094643221?s=p34ikai0ec7inriec8lw9qtiuhhm65cy Preview: All entries for Shield Information Barrier in API ref: https://staging.developer.box.com/reference/resources/shield-information-barrier-report/ Fixes: `DDOC-587`

# Description Add DELETE endpoint for retention policies Preview: https://staging.developer.box.com/reference/delete-retention-policies-id/ Fixes DDOC-652

# Description Added new event types to the event type list. Fixes DDOC-1036

# Description Added basic guides for metadata extraction. Fixes # DDOC-1058