make table bg color dynamic as per theme

[krVatsal]

Description

Fixes #6634
This PR fixes the table background color in the Backdrop component guidance page to be theme aware. Previously, the table had a hardcoded dark background color (#121212) that didn't adapt to the light theme mode.

Changes Made:

• Added useStyledDarkMode hook to detect current theme
• Updated table row background colors to be conditional:
  • Dark mode: #121212 (existing dark gray)
  • Light mode: White
• Applied the theme-aware styling to both table header and all table body rows

Notes for Reviewers

• The implementation follows the existing pattern used in other Sistent components
• Only minimal changes were made to maintain consistency with the codebase
• The table now properly adapts to both light and dark themes
• All other functionality and styling remains unchanged

Testing:

• Verified table displays correctly in light mode with #f2f2e8 background
• Verified table displays correctly in dark mode with #121212 background
• Confirmed theme switching works properly
• No other functionality affected

Signed commits

• Yes, I signed my commits.

[l5io]

🚀 Preview for commit 5a18a0b at: https://688cd524336ce2b82b243b85--layer5.netlify.app

[vr-varad]

Thank you for your contribution!
Let's discuss this during the website call today at 5:30 PM IST | 7 AM CT

Add it as an agenda item to the meeting minutes, if you would :)

[vr-varad]

@krVatsal Looks good to me.
Could you mind fixing the dco error https://github.com/layer5io/layer5/pull/6673/checks?check_run_id=47459414413
otherwise its good to merge.

[l5io]

🚀 Preview for commit 4ebd70e at: https://68927eabff8c70265b694cc5--layer5.netlify.app

[krVatsal]

@vr-varad can you share the doc which we were discussing in meet to fix this DCO issue, as the commit is already signed and i have also tried amending the commit

[l5io]

🚀 Preview for commit 18033c8 at: https://6895045847e2040da4ee0d68--layer5.netlify.app

[l5io]

🚀 Preview for commit 73780da at: https://689581583034d43b607ca88f--layer5.netlify.app