Address internals imported from Supervision

[grzegorz-roboflow]

What does this PR do?

Address internals imported from Supervision; modules not exposed through main namespace are not (and have never been) guaranteed to be available in future releases of Supervision

Type of Change

• Bug fix (non-breaking change that fixes an issue)

Testing

CI passing

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in hard-to-understand areas
• My changes generate no new warnings or errors
• I have updated the documentation accordingly (if applicable)

Additional Context

N/A

---

Note

Introduces new visualization blocks and migrates annotators to use Supervision’s public API surface.

• Adds roboflow_core/halo_visualization@v2 and roboflow_core/polygon_visualization@v2 with cached annotator construction, extended manifest docs, and parameters (opacity, kernel_size for halo; thickness for polygon)
• Registers new v2 blocks in loader.py
• Refactors common annotators (visualizations/common/annotators/halo.py, polygon.py) to import ColorLookup, ColorPalette, draw_polygon, mask_to_polygons from public supervision namespace; replaces direct ImageType with a TypeVar supporting numpy.ndarray and PIL.Image.Image; keeps conversion fallback for ensure_cv2_image_for_annotation
• Updates/extends unit tests to validate manifests and runtime for both v1 and v2 (tests/.../test_halo.py, test_polygon.py)

^{Written by Cursor Bugbot for commit b5aa41c. This will update automatically on new commits. Configure here.}

[codeflash-ai]

⚡️ Codeflash found optimizations for this PR

📄 1,057% (10.57x) speedup for HaloVisualizationBlockV1.getAnnotator in inference/core/workflows/core_steps/visualizations/halo/v2.py

⏱️ Runtime : 2.16 milliseconds → 187 microseconds (best of 5 runs)

A dependent PR with the suggested changes has been created. Please review:

• ⚡️ Speed up method HaloVisualizationBlockV1.getAnnotator by 1,057% in PR #1951 (fix/supervision-imports) #1952

If you approve, it will be merged into this PR (branch fix/supervision-imports).

[grzegorz-roboflow]

bugbot review

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

Comment @cursor review or bugbot run to trigger another review on this PR