automatic integration test

[larshp]

running in github actions(and locally via node)

Mocked: if I remember correctly, there is a protocol example in the Microsoft spec, could be nice to set it up to run via a mock server(might not be possible due to random nonce)

Also find some real JS NTLM server and test against that

[larshp]

the ABAP part for the integration test is to be placed in a folder different from /src/, so it is not installed to customer systems

much like https://github.com/abap-openapi/abap-openapi-client/tree/main/test

[larshp]

prerequisites: open-abap/open-abap-core#106