[User Feedback] Create a dropdown to select a color to use when drawing the next line/shape

[ryan953]

Design: https://www.figma.com/design/34SnbIZdaYu0TBCfGcpjA3/Specs%3A-Feedback-Widget-v2?node-id=754-121&p=f&t=X2uCmcxRg00aSusK-0

Note: Preselected colours only. Disabled when cropping mode is selected

[ryan953]

We're dropping this in favor of controls to Highlight & Mask section of the page. No detailed drawing required.