Improved Interpolation

[NiklasReiche]

• [x] Add HSV interpolation
• [x] Add RGB <-> HSV conversion for HASS lights / Pillow image outputs
• [x] Add customization for interpolation procedure (weights, local influence)
• [x] Add app options for custom HSV color profiles
• [x] Add tests for new functionality
• [x] Update Readme
• [x] Add new plots to Readme

[NiklasReiche]

Old interpolation

New RGB interpolation (higher local influence)

New HSV interpolation

[NiklasReiche]

New built-in profiles: