Split launch.py into control_system.py and controller_api.py

[GDYendell]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 89.08046% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.24%. Comparing base (7d9dcb1) to head (d69bd70).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/fastcs/control_system.py	89.83%	12 Missing ⚠️
src/fastcs/controller_api.py	86.27%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #240      +/-   ##
==========================================
+ Coverage   90.20%   90.24%   +0.03%     
==========================================
  Files          45       46       +1     
  Lines        2276     2285       +9     
==========================================
+ Hits         2053     2062       +9     
  Misses        223      223              

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