New colour for cookie banner to improve ux readability

[letzya]

Preview Link

Cookie Banner UI and Functionality Improvements

This PR updates the cookie banner to match the requested design specifications and improves functionality.

Changes made:

Visual Updates

• Updated Accept button colors to teal background with dark purple text
• Maintained Reject button as transparent with white text and border
• Moved the cookie policy link to the message (was near the buttons)

Testing:

• Tested on local environment to verify banner display and styling
• Confirmed both Accept and Reject buttons work correctly
• Verified cookie banner disappears after user interaction
• Ensured cookies are properly stored in localStorage

Screenshots:

Checklist

• Added a preview link
• Reviewed AI PR Agent suggestions
• For Tyk Members - Added Jira DX PR ticket to the subject
• For Tyk Members - Added the appropriate release labels (for fixes add the latest release)

New Contributors

• Make sure you have started your change off our latest master.
• I have reviewed the guidelines for contributing to this repository.
• I have read the technical guidelines for contributing to this repository.

[netlify]

✅ PS. Pls add /docs/nightly to the end of url

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