Redesign the "Examples" section on TV

[MGaetan89]

Pull request

Description

This PR updates the "Examples" section in the TV demo app so it looks more like the "Lists" section.

Changes made

• Refresh the layout of the "Examples" section
• Add the Paddings class in the TV demo app (similar to what was done in Centralise padding values #332)

Screenshots

Description	Screenshot
Examples main section
Example sub-section

Checklist

• Your branch has been rebased onto the main branch.
• APIs have been properly documented (if relevant).
• The documentation has been updated (if relevant).
• New unit tests have been written (if relevant).
• The demo has been updated (if relevant).
• All pull request status checks pass.