Refactor RF initialize function

[danielschloms]

Description

This PR

• contains a refactoring of the code used to initialize and configure the RF module. Old functions based on passing a pointer and length have been replaced with our span-based SetProperties() and SendCommand(). Furthermore, the obvious magic values have been moved into constants, and the delays in the SPI communication have been removed.
• introduces FlatArray(), a function to create a flat std::array from values, arrays, spans, or a mix thereof.
• adds all our .hpp and .ipp files to iwyu.imp and orders them alphabetically.
• fixes all #includes according to IWYU.

Fixes #224

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 98.38710% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 88.36%. Comparing base (d9fd1c0) to head (42ec759).

Files	Patch %	Lines
Sts1CobcSw/Utility/FlatArray.hpp	88.88%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #256 +/- ## ========================================== + Coverage 87.15% 88.36% +1.20% ========================================== Files 18 20 +2 Lines 514 576 +62 ========================================== + Hits 448 509 +61 - Misses 66 67 +1 ```

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[danielschloms]

While one comment mentions not to use trailing comments, the "layout" of the Initialize() function with comments right beside the property values would make it very easy to spot and change single values, if that were needed later.