docs: Updated folder hierarchy of doc source and nootbooks to rst file

[felixdittrich92]

#851

[codecov]

Codecov Report

Merging #862 (c9baa1b) into main (2b70a94) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #862      +/-   ##
==========================================
+ Coverage   94.82%   94.84%   +0.01%     
==========================================
  Files         133      133              
  Lines        5200     5200              
==========================================
+ Hits         4931     4932       +1     
+ Misses        269      268       -1     

Flag	Coverage Δ
unittests	94.84% <ø> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
doctr/transforms/functional/base.py	97.10% <0.00%> (+1.44%)	⬆️

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[fg-mindee]

Thanks!

This cannot be merged before #856 due to the "tabs" dependency, let's wait for that one!

[felixdittrich92]

@fg-mindee
2 changes:
added Imgur to dataset list index.rst
fixed notebooks by replacing with rst
With old theme: now looks well also with new theme

[fg-mindee]

Thanks Felix!