Feature/0.4.0

[cregouby]

A work in progress small fix to

• reduce the test footprint (GPU image size and test duration), but still creating Segmentation fault (core dumped) when testing Exemples and computing code coverage.
• test variability,
• make a more attractive readme,
• fix the text artefact produced by autoplot() code

[codecov[bot]]

Codecov Report

Merging #86 (8a61537) into main (162134c) will increase coverage by 0.04%. The diff coverage is 100.00%.

:exclamation: Current head 8a61537 differs from pull request most recent head 69afbb7. Consider uploading reports for the commit 69afbb7 to get more accurate results

@@            Coverage Diff             @@
##             main      #86      +/-   ##
==========================================
+ Coverage   87.50%   87.54%   +0.04%     
==========================================
  Files          10       10              
  Lines        1072     1052      -20     
==========================================
- Hits          938      921      -17     
+ Misses        134      131       -3     

Impacted Files	Coverage Δ
R/explain.R	92.30% <ø> (-1.18%)	:arrow_down:
R/model.R	94.59% <ø> (+0.53%)	:arrow_up:
R/plot.R	100.00% <ø> (ø)
R/pretraining.R	94.30% <100.00%> (-1.16%)	:arrow_down:

... and 3 files with indirect coverage changes

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