Launch arguments support bool instead of string types only

[henningkayser]

The priorliy used string comparison would not work when passing proper bool types when including the launch file. This fix allows using both string and bool values.

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 5.37%. Comparing base (1b121b7) to head (a216319). :warning: Report is 479 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #1484      +/-   ##
========================================
+ Coverage   3.59%   5.37%   +1.78%     
========================================
  Files         13      33      +20     
  Lines        947    3239    +2292     
  Branches     152     391     +239     
========================================
+ Hits          34     174     +140     
- Misses       843    3063    +2220     
+ Partials      70       2      -68     

Flag	Coverage Δ
unittests	5.37% <ø> (+1.78%)	:arrow_up:

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[urfeex]

Hm, Kilted should be green except for binary/main. I'll check why it is not with this PR.