Add LookupResources example

[ivanauth]

Fixes #74

Adds a comprehensive example demonstrating how to use LookupResources with streaming responses.

What's Included

• Complete working example in examples/v1/lookup_resources.rb
• Shows how to handle streaming LookupResourcesResponse
• Demonstrates collecting results into an array
• Includes examples for multiple permissions (read and write)
• Follows the same pattern as existing examples in the repo

The example clearly shows how to interact with the stream-based API and collect resource IDs.

[tstirrat15]

LGTM. Thanks for putting this up!