[Thermometer] - thermometer coloring should use hsl

[bracyw]

Description

Currently we use a hardcoded transition, using ternary operators from of colors for the thermometer. Instead we should use calculated values to have a smooth transition of colors, using hsl.

Acceptance Criteria

• Calculated values using hsl for color of thermometer.
• Colors are roughly the same as before (with exception of tiny difference because of the transitioning)

Proposed Solution

This is all in the NERODevelopment/content/Thermometer.qml file on around line 15.

We implement in a similar way in Argos: https://github.com/Northeastern-Electric-Racing/Argos/blob/f1c38737db5a4e21432018f78ca7e74f12625932/angular-client/src/pages/bms-debug-page/components/cell-by-cell-heat-map/cell-by-cell-heat-map.component.ts#L100

(same concept applies, calculate hsl value based on value, also you may add something to inversion which needed)

Mocks

No response