[Feature] Client OpenApi generation

[langehm]

Relevant template

refarch-frontend, refarch-webcomponent

Problem description (optional)

Currently, there is no automated mechanism for generating client-side code based on the existing OpenAPI specification. This leads to manual efforts when updating API clients, which is both time-consuming and error-prone.

Desired solution

Introduce a process for automatically generating client-side code using the existing OpenAPI specification. The generated code should be compatible with VueJS and typescript used on the client side.
Therefore the openapi-generator-cli should be used as a dependency. Wether to use the standard fetch or the axios library can be discused (maybe the fetch library is enough - this reduces the amount of dependencies in general).

The process should be integrated into the build pipeline or provide a script for manual invocation.

Considered alternatives (optional)

There should be no manual way - this should be standardized!

Additional context (optional)

The spezification needs to be generated in some way. An open issue already exists for swagger documentation of the api - maybe there could be some kind of extension to also generate the api-specification (yaml).

No duplicate

• I confirm that this issue is not a duplicate

Code of Conduct

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[langehm]

Should we reintroduce the shared folder for the openapi description? This should not be placed inside the backend folder as this name can change!