feat: Add game slice to explore page

[steverydz]

Done

Adds the gaming slice section to the explore page.

See design for reference

How to QA

• Go to https://snapcraft-io-5451.demos.haus/explore
• Check that there is a "Everything for your game night" section
• Considerations for design review:
  • The ratings aren't currently available which is why they are not present
  • I have included four snaps rather than three which are in the design to bring it inline with the current design
  • Whilst in the design the image is full width, I have used the Vanilla image card pattern, but can change this
  • The problem with images is that the publisher can upload a variety of sizes so we can't ensure that it matches across all cards
    • I've used the Vanilla aspect ratio pattern to manage this
    • If the ratio doesn't match, it will either crop it's height or have some space either side, depending on the ratio
    • I have added the highlight class so it at least marks the boundaries of the image

Testing

• This PR has tests
• No testing required (explain why): No behavioural changes

Issue / Card

Fixes https://warthogs.atlassian.net/browse/WD-30640

[webteam-app]

Demo

Jenkins

demos.haus