Draft: Clang format - code reformatting

[SiskaPavel]

Adds new options to the Makefile: Introduces new options, "format-check" and "format-fix," to the Makefile for checking and fixing code formatting in .cpp and .hpp files.

Performs code reformatting across the entire repository: Aims to achieve consistent and uniform code formatting by addressing code indentation, spacing, and other style-related issues in all relevant code files.

Incorporates a new step into the Continuous Integration (CI) process: Enhances code quality by adding the "make format-check" command to the CI pipeline, ensuring that code formatting is validated automatically for all code changes pushed to the repository. This step is crucial for maintaining code consistency and adherence to coding standards.

[codecov-commenter]

Codecov Report

Attention: 2300 lines in your changes are missing coverage. Please review.

Comparison is base (cfc02c2) 41.26% compared to head (336c934) 41.52%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #192      +/-   ##
==========================================
+ Coverage   41.26%   41.52%   +0.25%     
==========================================
  Files          94       94              
  Lines        8665     9152     +487     
  Branches     1299     1300       +1     
==========================================
+ Hits         3576     3800     +224     
- Misses       4321     4572     +251     
- Partials      768      780      +12     

Flag	Coverage Δ
tests	41.52% <35.04%> (+0.25%)	:arrow_up:

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

Files	Coverage Δ
include/ipfixprobe/input.hpp	100.00% <100.00%> (ø)
include/ipfixprobe/output.hpp	100.00% <100.00%> (ø)
process/http.cpp	44.12% <ø> (ø)
process/http.hpp	32.05% <ø> (+0.40%)	:arrow_up:
process/icmp.cpp	28.57% <ø> (+1.90%)	:arrow_up:
process/icmp.hpp	0.00% <ø> (ø)
process/idpcontent.cpp	96.15% <ø> (+0.32%)	:arrow_up:
process/idpcontent.hpp	35.13% <ø> (+6.10%)	:arrow_up:
process/md5.cpp	86.16% <ø> (ø)
process/mpls.cpp	30.76% <ø> (ø)
... and 76 more

... and 1 file with indirect coverage changes

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