Publish mod-agreements API documentation on dev.folio.org

FOLIO publishes API documentation at https://dev.folio.org/reference/api/

However, mod-agreements' API documentation is at https://github.com/ostephens/folio-erm-agreements-api-os/ , it is not easy to find (side note: and developers cannot update both the implementation and documentation in a single pull request when working on a feature), and several steps (clone, npm) are needed to convert the raw openapi documentation into the final HTML documentation (see https://github.com/ostephens/folio-erm-agreements-api-os/blob/main/README.md ).

As of 2023-03-16:

• 112 pathPattern API entries in https://github.com/folio-org/mod-licenses/blob/master/service/src/main/okapi/ModuleDescriptor-template.json
• 31 path API entries in https://github.com/ostephens/folio-erm-agreements-api-os/tree/main/openapi/paths

One option is to move the documentation into the mod-agreements repository and use Jenkins' API documentation deploy feature: https://dev.folio.org/guides/api-lint/#jenkinsfile-for-oas

Acceptance criteria:

• mod-agreements' API documentation is listed (content or link) on https://dev.folio.org/reference/api/
• all APIs are documented

 (This ticket may be split into smaller tasks.)