Refactor/Refactor controller logic

[iGxnon]

Base on #19

Please briefly answer these questions:

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?)

  This PR refactor controller into three parts: Extractor, Factory, Manager.
  Introducing these components benefits us by segregating the logic of the controller, facilitating unit testing, and preparing for the eventual replacement of the StatefulSet controller.

• what changes does this pull request make?

  As above.

• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc)

  No

[codecov]

Codecov Report

Attention: 410 lines in your changes are missing coverage. Please review.

Comparison is base (c50a845) 18.94% compared to head (68810f8) 40.68%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #27       +/-   ##
===========================================
+ Coverage   18.94%   40.68%   +21.73%     
===========================================
  Files          23       21        -2     
  Lines        1768     1728       -40     
  Branches     1768     1728       -40     
===========================================
+ Hits          335      703      +368     
+ Misses       1427     1012      -415     
- Partials        6       13        +7     

Files	Coverage Δ
operator-api/src/lib.rs	73.33% <100.00%> (ø)
operator-k8s/src/lib.rs	100.00% <ø> (ø)
sidecar/src/lib.rs	100.00% <ø> (ø)
sidecar/src/routers.rs	0.00% <ø> (ø)
sidecar/src/xline.rs	0.00% <ø> (ø)
operator-k8s/src/config.rs	0.00% <0.00%> (ø)
operator-k8s/src/crd/v1alpha1/cluster.rs	92.92% <80.00%> (-0.69%)	⬇️
sidecar/src/utils.rs	62.16% <71.42%> (ø)
operator-k8s/src/monitor.rs	50.72% <28.57%> (ø)
operator-k8s/src/crd/version.rs	74.35% <0.00%> (ø)
... and 5 more

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[Phoenix500526]

LGTM