Refine LHCb analysis example

[bernhardmgruber]

• Improve terminal output
• Switch to C++20 (following ROOT's C++20 support)
• Show how to download the input file
• Add missing columns and preserve file order
• Avoid "_copy" in dumped ROOT histograms
• Add another mapping grouping H1ProbK with the ..isMuons
• Refactor file writing
• Allow to customize bits for layout 6 and 8
• Dump smaller layout visualization
• Including a few missing bitpack runs

[codecov]

Codecov Report

Merging #741 (be35122) into develop (77fb27d) will not change coverage.
The diff coverage is 100.00%.

❗ Current head be35122 differs from pull request most recent head 4b2f936. Consider uploading reports for the commit 4b2f936 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #741   +/-   ##
========================================
  Coverage    98.80%   98.80%           
========================================
  Files           75       75           
  Lines         7212     7212           
========================================
  Hits          7126     7126           
  Misses          86       86