refactor: separate service to manage processes

[lars-reimann]

Summary of Changes

• Add a separate service to manage processes
• Move memoization logic into own package
• Only handle websocket connections in the server

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	20	0	0	1.05s
✅ PYTHON	mypy	20		0	2.65s
✅ PYTHON	ruff	20	0	0	0.04s
✅ REPOSITORY	git_diff	yes		no	0.01s

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (7cfc0e2) to head (b6e8fb9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #97   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           14        15    +1     
  Lines          717       778   +61     
=========================================
+ Hits           717       778   +61     

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[lars-reimann]

🎉 This PR is included in version 0.14.0 🎉

The release is available on:

• v0.14.0
• GitHub release

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