[CWM] Convert backend to Typescript & implement API type safety / validation

[rogup]

Description

Following on from the investigation in https://github.com/DigitalCommons/mykomap/issues/269 , we need to have a go at implementing ts-rest + Zod on the backend.

Acceptance Criteria

• [x] All back-end source code is in typescript ~and fully typed~ -> Nick to work on this
• [x] We have a typescript ts-rest contract file in the API shared library, that defines our REST API.
• [x] We have a script that can generate an OpenAPI spec from our ts-rest contract
  • [ ] and maybe automatically upload it to SwaggerHub as part of our CI pipeline?
• [x] We have runtime validation of our back-end API routes using Zod
• [x] Changes to the contract are immediately flagged as type errors in the FE/BE without need for a build or code generation.

[wu-lee]

Back-end is now typescript, as of e5b84f86450. Initially with @ts-nocheck but those are now removed.

The tsconfig.json is using strict, but I'm not certain how strict the typing is however. I have a feeling we got Mykomap 3.0 to be more strict than this. Will investigate in future work, however.

[wu-lee]

@rogup I've just submitted a review request for the branch ts-restify-the-backend here: https://github.com/DigitalCommons/mykomap-monolith/pull/15

This should cover the final two points on the list above. (But not including uploading the swagger spec.)

[wu-lee]

Merged a while ago, I think this is done, so closing.