Added docs and example for tile

[js-goupil]

Resolves https://github.com/Shopify/pos-next-react-native/issues/36278

Background

Adds some documentation and code examples for the Tile component.

Solution

Skipping the asset for now, since we're going to be adding fresh ones later.

🎩

https://shopify-dev.ui-extensions-7t4u.jeansebastien-goupil.us.spin.dev/docs/api/pos-ui-extensions/unstable/components/tile

Checklist

• I have 🎩'd these changes
• I have updated relevant documentation

[github-actions]

We detected some changes in packages/*/package.json or packages/*/src, and there are no updates in the .changeset directory. If the changes are user-facing and should cause a version bump, run yarn changeset to track your changes and include them in the next release CHANGELOG. If you are making simple updates to repo configuration, examples, or documentation, you do not need to add a changeset.

[vctrchu]

No references to images in your code so I'm assuming your spin instance is out of date which is why its showing the text area image still

[vctrchu]

Looks good