[FEAT] Add color theme changer in the app

[Varun-Kolanu]

Is your feature request related to a problem? Please describe.
Now, there exists dark and light modes.

Describe the solution you'd like
It would be a good feature if someone can upload a pic of a color and we fetch the color from it, apply that theme to the app.
If light mode, the shades of color will be light and if dark, it would be darker.

Put this selection feature in a seperate page. We shall shift it to settings page later

Describe alternatives you've considered
If this seems to be hard, you can choose 2-3 themes of your own and give an option to choose a theme.

Additional context
Maybe some researching different solutions available before on how to implement would make it easier

[issue-assigner]

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