Set up coordinate system widget

[noemifrisina]

Closes #30

[codecov]

Codecov Report

❌ Patch coverage is 68.68687% with 62 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.48%. Comparing base (0d75f60) to head (5bc0b72).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/i19serial_ui/gui/widgets/cs_panel.py	70.31%	38 Missing ⚠️
src/i19serial_ui/blueapi_tools/blueapi_client.py	40.00%	21 Missing ⚠️
src/i19serial_ui/parameters/coordinates.py	83.33%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
- Coverage   96.28%   88.48%   -7.80%     
==========================================
  Files          12       16       +4     
  Lines         485      695     +210     
==========================================
+ Hits          467      615     +148     
- Misses         18       80      +62     

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