Reintroduce clang-format rules and remove IDE specific configuration

[rdmark]

This reverts a previous change where configurations for the Eclipse IDE specifically was introduced.

I think it's more important to have an IDE agnostic formatting framework, which clang-format provides

Example command for formatting all C++ source code, as run from within the cpp dir:

find . -iname '*.h' -o -iname '*.cpp' | xargs clang-format -i

[nucleogenic]

Makes sense! 🧹

[rdmark]

@nucleogenic do you have a preference of tab indentation vs. space indentation?

The majority of C++ files use tab indentation right now, but there's a sizable chunk of space indented code too. Whatever we do there's going to be a huge diff.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[rdmark]

I will postpone the wholesale reformatting of the codebase to another time. After reformatting the code does compile and sonarqube doesn't complain about new issues, so it should be fine. I had to add two rules compared to the original by @akuker -- namely IncludeBlocks: Preserve and SortIncludes: false. When clang-format messed with the header include order certain symbols didn't get declared in time for other parts of the code.

Future improvements include adding a formatting check to CI, introduce git hooks and helper scripts.