Revisit ResultEvaluators

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (269b7cf) 93.16% compared to head (1f5533d) 91.38%.

:exclamation: Current head 1f5533d differs from pull request most recent head 02e384e. Consider uploading reports for the commit 02e384e to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #251 +/- ## ========================================== - Coverage 93.16% 91.38% -1.78% ========================================== Files 57 57 Lines 2048 1950 -98 ========================================== - Hits 1908 1782 -126 - Misses 140 168 +28 ``` | [Flag](https://app.codecov.io/gh/ikarus-project/ikarus/pull/251/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ikarus-project) | Coverage Δ | | |---|---|---| | [tests](https://app.codecov.io/gh/ikarus-project/ikarus/pull/251/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ikarus-project) | `91.38% <100.00%> (-1.78%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ikarus-project#carryforward-flags-in-the-pull-request-comment) to find out more.

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[henrij22]

I refactored according to your comments: we have now the following format:

// If no UserFunction is provided
auto resultFunction = Ikarus::makeResultFunction<resType>(&fes, feRequirements);

// With UserFunction
auto resultFunction = Ikarus::makeResultFunction<resType, ResultEvaluator>(&fes, feRequirements);

[rath3t]

Thanks Henri!