68 update readme for interface vector inputs

[MelihAkdag]

Description

Resolves #68

1. I updated the ReadMe file by changing the interface.json definition section. I included how to define an input vector.
   Also I pointed out where to find more information about the other sections for the interface schema.

2. I also included the new example (wind power prediction model using Pyspark + Onnx + MLFMU under the examples directory. I included the jupyter notebook where I created the ML model, original dataset, final onnx model, interface.json, final fmu.

Developer Checklist (before requesting PR review)

• My code follows the style guidelines of this project
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

I have:

• commented my code, particularly in hard-to-understand areas
• performed a self-review of my own code
• not committed unnecessary formatting changes, thereby occluding the actual changes (e.g. change of tab spacing, eol, etc.)
• made corresponding changes to the documentation
• added change to CHANGELOG.md
• added tests that prove my fix is effective or that my feature works (for core features)

Reviewer checklist

I have:

• have performed a review of the code
• tested that the software still works as expected
• checked updates to documentation
• checked that the CHANGELOG is updated

[StephanieKemna]

Thanks, I expect this will be great! Just cannot test it right now .. so awaiting that.
Commented on some other aspects here. Also, changes should be added to CHANGELOG.

[StephanieKemna]

@MelihAkdag we can merge main into this branch, and resolve conflicts? then I can test to run everything. Do you wanna do the merging and all, before I test, or want me to merge and resolve conflicts and test?