templates(remix-tutorial): Add artificial delay to contact retrieval for demonstration

[kei-yamazaki]

Add Loading Delay to Contact Fetch Operation

Closes: # (no specific issue to close)

[x] Tests
[ ] Docs

Changes Made

Added a 500ms artificial delay to the getContact function to simulate network latency in the contact fetching operation. This change helps to demonstrate loading states in the UI more effectively during the tutorial.

Testing Strategy

This change can be tested by:

1. Running the tutorial application
2. Navigating to a contact's details page
3. Verifying that there is a noticeable 500ms delay before the contact information appears
4. Confirming that the loading state is properly displayed during this delay

The delay is implemented using a Promise-based setTimeout, which is a common pattern for simulating network conditions in demo applications.

Impact

This is a minor change that only affects the tutorial example and does not impact any core functionality. The delay is small enough to maintain a good user experience while being long enough to demonstrate loading states effectively.

[changeset-bot]

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Latest commit: 1356335

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[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳