refactor/nanocld: cleaner process services with file separation

[leon3s]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 40.72727% with 163 lines in your changes missing coverage. Please review.

Project coverage is 62.11%. Comparing base (bb76713) to head (93d9b9c).
Report is 3 commits behind head on nightly.

Files with missing lines	Patch %	Lines
bin/nanocld/src/services/process/log.rs	2.32%	84 Missing ⚠️
bin/nanocld/src/services/process/wait.rs	1.88%	52 Missing ⚠️
bin/nanocld/src/services/process/start.rs	46.15%	14 Missing ⚠️
bin/nanocld/src/services/process/count.rs	11.11%	8 Missing ⚠️
bin/nanocld/src/services/process/stats.rs	86.11%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           nightly    #1113      +/-   ##
===========================================
+ Coverage    61.92%   62.11%   +0.19%     
===========================================
  Files          269      278       +9     
  Lines        15757    15757              
===========================================
+ Hits          9757     9788      +31     
+ Misses        6000     5969      -31     

Flag	Coverage Δ
unittests	62.11% <40.72%> (+0.19%)	⬆️

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