Dark Theme Implementation for Login Page

[shagithubrit]

The current login page uses a high-contrast light theme that can cause eye strain during extended use or in low-light conditions. We need to implement a dark theme version with reduced contrast and more comfortable color combinations. @vijayalaxmi777 @Shashankk99 @mithelan @SubhashreePrusty @JaiSharma1710 Kindly assign me this issue .

[github-actions]

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[github-actions]

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[shagithubrit]

/assign