feat: BROS-615: Vector UX rework

[nick-skriabin]

This PR includes several UX improvements, additionally some features were disabled or changed:

• Vector region always starts in editable mode whether it's a new or existing regions -- no more double click to enter this mode
• Transform mode starts by double-clicking the shape allowing transformations
• Users can now freely drag the shapes or points around no matter whether they're selected or not

Improvements:

• Increased point hit radius to make point selection easier
• Improved selected point visuals to tell exactly what points are selected or active
• Partial vector deletion -- user can now select multiple points and delete only them instead of deleting entire region

Fixes:

• Saving the annotation now works as intended without errors
• Bezier curves have been temporarily disabled
• Drawing when zoomed in now works as expected
• Clicks now ALWAYS produce a point
• Undo history properly works for Vector and Polygon regions (previously was removing 2 points at a time)

vector-improvements.mp4

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[codecov]

Codecov Report

❌ Patch coverage is 1.05708% with 468 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.82%. Comparing base (0a7db05) to head (0f6ad0b).

Files with missing lines	Patch %	Lines
...rc/components/KonvaVector/components/GhostLine.tsx	0.00%	123 Missing ⚠️
...ponents/KonvaVector/eventHandlers/mouseHandlers.ts	0.00%	94 Missing ⚠️
web/libs/editor/src/tools/Vector.js	0.00%	84 Missing ⚠️
web/libs/editor/src/regions/VectorRegion.jsx	3.77%	51 Missing ⚠️
...components/KonvaVector/components/VectorPoints.tsx	0.00%	36 Missing ⚠️
...src/components/KonvaVector/pointCreationManager.ts	0.00%	33 Missing ⚠️
...c/components/KonvaVector/components/GhostPoint.tsx	4.00%	24 Missing ⚠️
...nents/KonvaVector/components/VectorTransformer.tsx	0.00%	8 Missing ⚠️
...onents/KonvaVector/eventHandlers/pointSelection.ts	0.00%	6 Missing ⚠️
...itor/src/components/KonvaVector/pointManagement.ts	0.00%	3 Missing ⚠️
... and 3 more

❗ There is a different number of reports uploaded between BASE (0a7db05) and HEAD (0f6ad0b). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (0a7db05)	HEAD (0f6ad0b)
pytests	1	0
lsf-e2e	1	0

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #8789       +/-   ##
============================================
- Coverage    67.71%   49.82%   -17.89%     
============================================
  Files          806      553      -253     
  Lines        62093    40023    -22070     
  Branches     10328    10676      +348     
============================================
- Hits         42044    19941    -22103     
- Misses       20046    20079       +33     
  Partials         3        3               

Flag	Coverage Δ
lsf-e2e	?
lsf-integration	49.32% <0.42%> (-1.36%)	⬇️
lsf-unit	8.10% <1.05%> (-0.26%)	⬇️
pytests	?

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[niklub]

/git merge

Workflow run
Successfully merged: create mode 100644 label_studio/fsm/serializer_fields.py