fix: transform polygon/polyline points to screen space

[wodeni]

Description

Fixes: #724

The points property for Polyline and Polygon are currently passthrough properties. This PR adds attrPolyPoints for transforming a list of points to screen coordinates.

Checklist

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new ESLint warnings

[codecov]

Codecov Report

Merging #849 (1221f83) into main (2b00441) will decrease coverage by 0.06%.
The diff coverage is 11.11%.

@@            Coverage Diff             @@
##             main     #849      +/-   ##
==========================================
- Coverage   69.08%   69.01%   -0.07%     
==========================================
  Files          62       62              
  Lines        7821     7830       +9     
  Branches     1459     1459              
==========================================
+ Hits         5403     5404       +1     
- Misses       2405     2413       +8     
  Partials       13       13              

Impacted Files	Coverage Δ
packages/core/src/renderer/Polygon.ts	25.00% <0.00%> (-2.28%)	⬇️
packages/core/src/renderer/Polyline.ts	25.00% <0.00%> (-2.28%)	⬇️
packages/core/src/shapes/Polygon.ts	100.00% <ø> (ø)
packages/core/src/shapes/Polyline.ts	100.00% <ø> (ø)
packages/core/src/renderer/AttrHelper.ts	83.75% <14.28%> (-3.18%)	⬇️

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