Introduce system/phase timers

[AndreasLrx]

Description

Everything (soon) in the doc.

Close: #181

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Added/updated tests?

• New tests written
• Existing tests updated
• Tests are not required because this is a documentation update
• I need help with writing tests

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 91.11111% with 4 lines in your changes missing coverage. Please review.

Project coverage is 82.36%. Comparing base (e1fcd84) to head (63b3d35).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ecstasy/system/Timer.cpp	91.66%	2 Missing and 1 partial ⚠️
src/ecstasy/system/Pipeline.cpp	75.00%	0 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #186      +/-   ##
==========================================
+ Coverage   82.18%   82.36%   +0.18%     
==========================================
  Files          68       70       +2     
  Lines        1201     1242      +41     
  Branches      371      383      +12     
==========================================
+ Hits          987     1023      +36     
- Misses        145      148       +3     
- Partials       69       71       +2     

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