Add cluster table component

The major improvements in this pull request:

if data contains mean and standard deviation, the sort function only considers mean values.
if data contains a list of strings e.g. strings including html code, the sort function ignores those values.
the table renders html codes.
haddock data example is created. However, the data format is still not in the exact form retrieved from tables in libplots.py.
The following PR is https://github.com/haddocking/haddock3/pull/667

i-VRESSE / haddock3-analysis-components