add FeatureExtractorSamples to api-infix

[robstoll]

Platform (all, jvm, js): all
Extension (none, kotlin 1.3): none

Code related feature

We have samples for api-fluent: ch.tutteli.atrium.api.fluent.en_GB.samples.FeatureExtractorSamples and we would like to copy & adopt them to api-infix:

TODO:

api-infix

• copy FeatureExtractorSamples to api-infix and adopt the code
• link to the samples in featureExtractors in api-infix

Your first contribution?

• Write a comment I'll work on this if you would like to take this issue over.
  This way we get the chance to revise the description in case things have changed in the meantime, we might give you additional hints and we can assign the task to you, so that others do not start as well.
• See Your first code contribution for guidelines.
• Do not hesitate to ask questions here or to contact us via Atrium's slack channel if you need help
  (Invite yourself in case you do not have an account yet).

[shivenducs1136]

I'll work on this

[robstoll]

@shivenducs1136 do you need help?

[constantine-zubrylin]

I'll work on this