Added colour palette to change colour themes

[Vinayak2805]

This feature enables the user to change the colour theme of the application to primary-blue, dange-red,success-green, warning-yellow, dark-black, light-white themes.

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Name	Status	Preview	Updated
text-utils	✅ Ready (Inspect)	Visit Preview	Oct 19, 2022 at 2:23PM (UTC)

[Vinayak2805]

78

[Susmita-Dey]

@Vinayak2805 You made things colorful. I need another approval for this PR.

[Vinayak2805]

Ya sure