[FEA]: Resource-Based Buffer Creation and Consumption Example

Implement an example with two functions: one accepting a resource to create an async_buffer, and another consuming it. Both should have host and device paths based on resource/buffer properties, showing how execution space selection propagates via types. Prefer host execution if available, as all our resources are device-accessible.

Demonstrate API usage such as:
auto buffer = produce_buffer(some_resource);
consume_buffer(buffer);