Using the ID type makes type errors more likely because we accept a
wider range of types as arguments for API operations than we actually
support on a logic level, i.e. when using maps because

	Map<ID, T>.get('1') !== Map<ID,T>.get(1)

refs #185

refs #146

refs #127

refs #127

API object attribute names are now:

1. camelCased (#164)
2. use Id / Ids suffix for object references (#172)

refs #127

closes #138

Not all API endpoints will have the same behaviour. Some may only allow
updates but can’t remove items, others will use a paginated result list
instead of a plain result array.

This re-implements the auth store with pinia.

Other notable changes:
* the OIDC client configuration and setup is now part of
  separate module that can be included by the OIDC callback routes
  and ensures that we always use the same OIDC client configuration.
* Authorization headers for the steering and tank REST APIs are now
  set with an axios interceptor instead of specifying them for each
  API store action.

refs #127