gh-NNNNNN: Improve colorsys module code quality

[KirobotDev]

Summary

Minor code quality improvements in
[Lib/colorsys.py](https://github.com/python/cpython/blob/main/Lib/colorsys.py):

• Simplified value clamping in yiq_to_rgb() using min() / max() instead of 6 if-blocks
• Replaced chain of if-statements in hsv_to_rgb() with a lookup table (tuple of tuples)
• Added spaces around modulo operator for consistency (i % 6 instead of i%6)

Changes

• Before: 167 lines with verbose control flow
• After: 154 lines, more Pythonic and readable

No functional changes — all existing behavior preserved.

Links

• Modified file: https://github.com/python/cpython/blob/main/Lib/colorsys.py
• Documentation: https://docs.python.org/3/library/colorsys.html

[python-cla-bot]

All commit authors signed the Contributor License Agreement.

[bedevere-app]

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[bedevere-app]

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If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

[picnixz]

This is code churn, sorry but we do not accept such changes.