[FIX] More codechecker checks

[eseiler]

https://docs.seqan.de/codechecker/sharg

After this, only shadowing stuff should remain.

[seqan-actions]

Documentation preview available at https://docs.seqan.de/preview/seqan/sharg-parser/269

[codecov]

Codecov Report

Attention: Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Project coverage is 94.62%. Comparing base (77c657a) to head (2e691ec).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
include/sharg/detail/format_tdl.hpp	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #269      +/-   ##
==========================================
- Coverage   94.63%   94.62%   -0.01%     
==========================================
  Files          18       18              
  Lines        1733     1731       -2     
  Branches       46       46              
==========================================
- Hits         1640     1638       -2     
  Misses         93       93              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.