ENH: intelmqsetup: revise installation of manager

[ghost]

requires certtools/intelmq-manager#282
updates, fixes and re-structures the documentation

[codecov-commenter]

Codecov Report

Merging #2114 (5f13476) into develop (1b75604) will decrease coverage by 0.07%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop    #2114      +/-   ##
===========================================
- Coverage    75.91%   75.83%   -0.08%     
===========================================
  Files          438      438              
  Lines        23512    23517       +5     
  Branches      3144     3146       +2     
===========================================
- Hits         17849    17834      -15     
- Misses        4932     4949      +17     
- Partials       731      734       +3     

Impacted Files	Coverage Δ
intelmq/bin/intelmqsetup.py	0.00% <0.00%> (ø)
intelmq/bots/experts/modify/expert.py	92.00% <0.00%> (-2.67%)	⬇️
intelmq/tests/lib/test_pipeline.py	97.61% <0.00%> (-2.39%)	⬇️
intelmq/bots/collectors/tcp/collector.py	82.00% <0.00%> (-2.32%)	⬇️
intelmq/lib/splitreports.py	97.82% <0.00%> (-2.18%)	⬇️
intelmq/lib/pipeline.py	64.37% <0.00%> (-0.34%)	⬇️
intelmq/lib/harmonization.py	86.91% <0.00%> (-0.31%)	⬇️
intelmq/lib/bot.py	63.40% <0.00%> (-0.05%)	⬇️
intelmq/bin/intelmqdump.py	18.36% <0.00%> (+0.06%)	⬆️
intelmq/bots/collectors/opendxl/collector.py	30.64% <0.00%> (+0.48%)	⬆️
... and 3 more