[x] For code changes: I have tested my changes locally and they work as expected.
[x] For new APIs or substantial changes: This PR has an associated issue (closes #0000) and has been approved by the maintainers.
Description
This PR refactors the structure of the documentation website to enhance organization, readability, and navigation. The changes include reorganization of content, updating the navigation menu, and improving the styling and layout.
PR Checklist
Description
This PR refactors the structure of the documentation website to enhance organization, readability, and navigation. The changes include reorganization of content, updating the navigation menu, and improving the styling and layout.
Changes
n/a
Testing
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Related Issues/PRs
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