Add support for rendering pandas styler objects

[philippjfr]

Fixes #2695

[codecov]

Codecov Report

Merging #3152 (3f974ce) into master (5bd9fc8) will decrease coverage by 0.01%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #3152      +/-   ##
==========================================
- Coverage   82.99%   82.98%   -0.02%     
==========================================
  Files         192      192              
  Lines       25482    25492      +10     
==========================================
+ Hits        21150    21155       +5     
- Misses       4332     4337       +5     

Impacted Files	Coverage Δ
panel/pane/markup.py	96.17% <33.33%> (-1.05%)	⬇️
panel/widgets/tables.py	84.76% <57.14%> (-0.22%)	⬇️

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