add actions for CITE testing about pygeoapi

[ricardogsilva]

@tomkralidis I've started some work on this here:

https://github.com/ricardogsilva/team-engine-action

Still early work, but I'm thinking it would be valuable to contribute it to someplace other than my personal account - perhaps to geopython? or maybe to opengeospatial? I mean after I can get it to a state where it actually works that is 😛

I'm thinking it would be a generic github action, that a user would configure with something like this:

jobs:
  perform-cite-testing:
    uses: team-engine-action@some-version
    with:
      server-url: <URL of the server under test>
      test-suites:
        - <id of ETS 1>
        - <id of ETS 2>
        - ...

[tomkralidis]

Thanks @ricardogsilva. For a broader effort, the best place for this work to take place would be in OSGeo. In the OSGeo Standards Committee we have often discussed the need for shared CITE testing across different OSGeo projects, so this sounds like the opportunity to do so :)

I've created https://github.com/OSGeo/ogc-cite-action and given us admin rights so you can continue the work there. Tagging/inviting @rouault @gfenoy @tfr42 @dstenger @ghobona who may also be interested in this effort.

We can then circle back here to complete integrating the actions the standards in scope.