* feat(fsxa-api integration): offer utilities for RESTful integrations

[neo-reply-lukas]

• feat(fsxa-api integration): offer utilities for rest-endpoint implementation backed by fsxa-api

Expose Parameter Validators and Wrappers with error handling to use in an endpoint implementation. Refactor default Express integration to use those wrappers

• fix(integrationtests): pass integrationtests

Minor Adjustments to pass integrationtests

• minor test adjustment

• docs(documentation): add Short Readme about integration and annotate exposed functions

• expose utils

[github-actions[bot]]

:tada: This PR is included in version 10.19.1 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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