Provide an example of a material shader that uses texture type of uint

## What solution would you like?

See this example:
https://github.com/bevyengine/bevy/blob/main/examples/shader/shader_material.rs

a similar example should be given but one where the texture is interpreted as TextureFormat::Rgba8Uint .

## Additional context
This would be helpful because i am very confused doing this migrating from 0.14 to 0.15 , seems to have changed ....

Start with examples/shader/shader_material.rs, linked in the issue, and compare its texture setup with the requested TextureFormat::Rgba8Uint case. Provide a similar material shader example that demonstrates the uint texture interpretation, then verify that the example builds and runs.

Written by the indexing model from the issue text.