Add monster desc

[marouenbg]

• Added description of MONSTER for input in gene regulatory networks https://github.com/netZoo/netZooR/issues/311

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (67e59ac) 40.49% compared to head (3e6af92) 40.49%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## devel #312 +/- ## ======================================= Coverage 40.49% 40.49% ======================================= Files 23 23 Lines 2857 2857 ======================================= Hits 1157 1157 Misses 1700 1700 ```

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