"plot-paralogs" command generates the "rate_adjustment/species" directory if the directory doesn't exist (i.e. it has been deleted), avoiding that the code crashes. 

* Condense, improve and clean up Nextflow logging
- tries to remedy visual issues in ANSI console by condensing and
  shortening line lengths of log output
- improves some wording, consistency and whitespacing of log output
- refactor some log output code into functions
- adds ksrates version to log

* Don't clean up if ksrates config file newly generated
There won't be anything to clean up, and onComplete would print
irrelevant warning about empty focal_species parameter.

* Single '/' in logs folder path when focal_species empty

* Some renaming of channels and variables
- Correction -> Adjustment
- peakCalling -> paralogsAnalyses

- If log file exists and ERROR lines exist,
  point only to the log file and not to
  the error report above.

- Added error message when logfile exists
  but there are no ERROR lines
- Reduce code redundacy

* LMM warns and skips if components > datapoints

- Print messages from errorReport and
  errorMessage also in case of existing log file
  with no ERROR lines in it to provide more
  guidance.
- The structure of the error handling is
  the same but with less redundancy (printing
  the headline is now done only once;
  "Caused by" line is done only once)

* When pipeline crashes, an error box is shown at the end of
   Nextflow error report: it prints the name of the
   stopped process, the error lines (if available) and points to
   the concerned log file(s) for more details.
* Update FAQs with error box description and figures

Co-authored-by: lohausr <56632794+lohausr@users.noreply.github.com>