docs: add swagger ui in docs

[julienrbrt]

Description

Closes: #15112
Waiting on PaloAltoNetworks/docusaurus-openapi-docs#396, the diff here will be smaller too ater that.

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[julienrbrt]

I think we should update the CSS to do not display a codeblock; otherwise it is a bit weird. Moreover there seems to be collisions in the urls (as the plugin takes the last part of the query).
I will tonight again investigate another way,

[julienrbrt]

Closing this as using this plugin does not fit our needs.
We should simply copy /client/docs/swagger-ui at build time to the docs.