Feature: Add spark cache.count() and display limit for koalas

[Vincent-Maladiere]

Description

As title says.

Checklist

• If this PR is a bug fix, the bug is documented in the test suite.
• Changes were documented in the changelog (pending section).
• If necessary, changes were made to the documentation (eg new pipeline).

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change

Comparison is base (6ec366e) 91.88% compared to head (9a64218) 91.89%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #39   +/-   ##
=======================================
  Coverage   91.88%   91.89%           
=======================================
  Files          67       67           
  Lines        2145     2147    +2     
=======================================
+ Hits         1971     1973    +2     
  Misses        174      174           

Impacted Files	Coverage Δ
eds_scikit/__init__.py	96.61% <100.00%> (+0.05%)	⬆️
eds_scikit/utils/custom_implem/custom_implem.py	87.50% <100.00%> (ø)
eds_scikit/io/hive.py	100.00% <0.00%> (ø)

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