Moved Jupyter guide to docs

[tovbinm]

Related issues
Docs & guides should be accessible from our docs site - https://docs.transmogrif.ai/en/stable/

Describe the proposed solution

• Moved helloworld/notebooks/README.md to docs
• Moved helloworld/notebooks/images to resources

Describe alternatives you've considered
N/A

[codecov]

Codecov Report

Merging #242 into master will decrease coverage by 41.93%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #242       +/-   ##
===========================================
- Coverage   86.42%   44.48%   -41.94%     
===========================================
  Files         312      312               
  Lines       10187    10187               
  Branches      336      548      +212     
===========================================
- Hits         8804     4532     -4272     
- Misses       1383     5655     +4272

Impacted Files	Coverage Δ
...sforce/op/stages/base/binary/BinaryEstimator.scala	0% <0%> (-100%)	⬇️
...la/com/salesforce/op/aggregators/Geolocation.scala	0% <0%> (-100%)	⬇️
.../salesforce/op/aggregators/FeatureAggregator.scala	0% <0%> (-100%)	⬇️
...ce/op/stages/impl/feature/TextLenTransformer.scala	0% <0%> (-100%)	⬇️
...stages/base/sequence/BinarySequenceEstimator.scala	0% <0%> (-100%)	⬇️
...lesforce/op/stages/impl/feature/LangDetector.scala	0% <0%> (-100%)	⬇️
...alesforce/op/cli/gen/templates/SimpleProject.scala	0% <0%> (-100%)	⬇️
...rce/op/stages/OpPipelineStageReadWriteShared.scala	0% <0%> (-100%)	⬇️
...es/sparkwrappers/specific/OpPredictorWrapper.scala	0% <0%> (-100%)	⬇️
...ages/base/sequence/BinarySequenceTransformer.scala	0% <0%> (-100%)	⬇️
... and 146 more

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[codecov]

Codecov Report

Merging #242 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #242      +/-   ##
=========================================
- Coverage   86.42%   86.4%   -0.02%     
=========================================
  Files         312     312              
  Lines       10187   10187              
  Branches      336     564     +228     
=========================================
- Hits         8804    8802       -2     
- Misses       1383    1385       +2

Impacted Files	Coverage Δ
...es/src/main/scala/com/salesforce/op/OpParams.scala	85.71% <0%> (-4.09%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 45ce014...6b82757. Read the comment docs.