Reorder filter definitions.

[Dimi1010]

Split of #1957.

The PR reorders the filter definitions in the order public / protected / private, allowing external behaviour (public methods) to be at the top of the class for easy reference. Notable exception are constructors, which are placed at the top of the class.

Additional changes:

• Exposed getOperator in the public API of IFilterWithOperator.
• Exposed getDir as getDirection in the public API of IFilterWithDirection.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.50%. Comparing base (32384c2) to head (f7ac625).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1965      +/-   ##
==========================================
- Coverage   83.51%   83.50%   -0.01%     
==========================================
  Files         311      311              
  Lines       54897    54887      -10     
  Branches    12207    12207              
==========================================
- Hits        45845    45833      -12     
  Misses       7788     7788              
- Partials     1264     1266       +2     

Flag	Coverage Δ
alpine320	75.96% <92.30%> (+<0.01%)	⬆️
fedora42	76.08% <92.30%> (-0.04%)	⬇️
macos-13	81.64% <90.47%> (-0.01%)	⬇️
macos-14	81.64% <90.47%> (-0.01%)	⬇️
macos-15	81.65% <90.47%> (-0.01%)	⬇️
mingw32	70.33% <69.23%> (-0.01%)	⬇️
mingw64	70.32% <69.23%> (+0.10%)	⬆️
npcap	?
rhel94	75.83% <92.30%> (-0.01%)	⬇️
ubuntu2004	60.26% <66.66%> (-0.01%)	⬇️
ubuntu2004-zstd	60.36% <66.66%> (-0.01%)	⬇️
ubuntu2204	75.74% <92.30%> (-0.01%)	⬇️
ubuntu2204-icpx	60.75% <80.95%> (-0.02%)	⬇️
ubuntu2404	75.99% <92.30%> (+<0.01%)	⬆️
ubuntu2404-arm64	75.61% <92.30%> (-0.02%)	⬇️
unittest	83.50% <100.00%> (-0.01%)	⬇️
windows-2022	85.50% <100.00%> (+0.14%)	⬆️
windows-2025	85.52% <100.00%> (+0.11%)	⬆️
winpcap	85.52% <100.00%> (-0.09%)	⬇️
xdp	53.55% <0.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ 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.