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feat: [#3649] Add rgb and lrgb color lerp modes (#3658)

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Closes #3649

## Changes:

- `Color.lerp` rename to `Color.lerpHSL`
- add `Color.lerpRGB` method, which uses linear interpolation for blending color
- add `Color.lerpLRGB` method, which uses linear interpolation with gamma correction
- add `Color.lerp` again, now as alias for other lerp methods with optional `colorSpace` param

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