Add pick color tool to the annotation

[ionleu]

Is your feature request related to a problem? Please describe.

It's hard to personalize or clearly differentiate annotations without being able to pick custom colors. I'm often frustrated when all annotations look the same, especially during detailed reviews or when collaborating with others.

Describe the solution you'd like

Add a color picker tool to the annotation options. This would allow users to choose any color for shapes, text, or highlights when annotating.

Describe alternatives you've considered

• Predefined color presets: rainbow colors

Additional context

Would be great to include:

• A simple UI color picker (like Chrome's default)
• Option to reuse recently used colors
• Ability to apply the chosen color to multiple annotation types (e.g. arrows, boxes, text)

This would significantly improve usability and clarity in annotation-heavy workflows.

[rahulrana701]

I can add this. There are lot of other features as well that I have planned for this extension.

[ionleu]

@rahulrana701,
great!

Let's start with #230 and we can continue with these once that one is completed.