generate Rust API server and Typescript client with OpenAPI schema

[jmviz]

https://github.com/oxidecomputer/progenitor (use build.rs method)
https://github.com/oxidecomputer/dropshot
https://docs.rs/dropshot/latest/dropshot/
https://docs.rs/dropshot/latest/dropshot/struct.ApiDescription.html#method.openapi

https://github.com/drwpow/openapi-typescript
https://openapi-ts.pages.dev/openapi-fetch/