add format workflow and fix formatting

[m-fila]

The repository has a JuliaFormatter configuration yet the formatting isn't enforced (if IDE has a format on save enabled then one get's a lot unintentional changes)

Adding a standard formatting workflow for github and fixing changes.

I propose to use JuliaFormatter v1 in the CI since the IDE extensions like vscode are still using it. Luckily for this project JuliaFormatter v1 and v2 produces the same output (for now)

In case you decide to accept this, please consider not-squashing so later the formatting commit can be added to .git-blame-ignore-revs to avoid polluting git blame

[codecov]

Codecov Report

Attention: Patch coverage is 43.93939% with 37 lines in your changes missing coverage. Please review.

Project coverage is 35.58%. Comparing base (2b757bd) to head (b353f80).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/event_generation/serial.jl	0.00%	14 Missing ⚠️
src/event_generation/threadsafe.jl	0.00%	12 Missing ⚠️
src/events.jl	45.45%	6 Missing ⚠️
ext/HEPExampleProjectMakieExt.jl	0.00%	3 Missing ⚠️
ext/HEPExampleProjectPlotsExt.jl	0.00%	1 Missing ⚠️
src/four_momentum.jl	92.85%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #10      +/-   ##
==========================================
+ Coverage   35.18%   35.58%   +0.39%     
==========================================
  Files           8        8              
  Lines         162      163       +1     
==========================================
+ Hits           57       58       +1     
  Misses        105      105              

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[szabo137]

Thanks for adding this!