fix(theme): resolve dark mode toggle issues on homepage and docs

[AnimeshPriyanshu]

Closes #548

Fixes the dark/light mode inconsistencies affecting the homepage and documentation pages.

Changes

• Fixed homepage theme toggle behavior to respond correctly to color mode changes.
• Resolved dark mode styling issues that caused content to become hidden or unreadable on documentation pages.

Flags

• Changes are limited to theme-related styling.
• Existing layout and functionality have been preserved.

Screenshots or Video

Related Issues

• Issue Theme toggle does not work on homepage #548

Author Checklist

• Ensure you provide a DCO sign-off for your commits using the --signoff option of git commit.
• Vital features and changes captured in unit and/or integration tests
• Commits messages follow AP format
• Extend the documentation, if necessary
• Merging to master from fork:branchname
• Manual accessibility test performed
  • Keyboard-only access, including forms
  • Contrast at least WCAG Level A
  • Appropriate labels, alt text, and instructions

[AnimeshPriyanshu]

Website

My changes

[AnimeshPriyanshu]

@mttrbrts can you take a look to this . I have made some changes in dark mode in documentation and homepage