External color palettes can be added/copied to profile

[noahonyejese]

Problem Description:
When users duplicate a chart, the associated custom color palette isn’t transferred to their profile, leading to inconsistencies and extra effort in recreating the desired visual style.

Proposed Solution:
Introduce a feature that, upon chart duplication, prompts users with an option to copy the custom color palette to their profile. This ensures visual consistency and streamlines the user experience.

Use Cases and Impact:
This enhancement benefits users who frequently duplicate charts, ensuring that their visual preferences are consistently applied across all charts. It reduces the time spent on manual adjustments and enhances the overall user experience.

Additional Context:
This feature is particularly useful for users who adhere to specific branding guidelines or have personalized color schemes for their visualizations.