Add support for framebuffer

[yowl]

Minor issue.

On WSL, a failure happens

wasi-logger: INFO -
choose example
1: simple graph
2: squeeze
3: mnist

3
wasi-logger: INFO - 3
thread '<unnamed>' panicked at /home/scott/.cargo/git/checkouts/wasi-webgpu-5092375e741b05a7/754ad0f/crates/wasi-webgpu-wasmtime/src/lib.rs:2105:14:
called `Result::unwrap()` on an `Err` value: NotFound
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Could be that WSL does not support the hardward accelerator function required to get the adapter. Would be nice if there was a path for just using a soft frame buffer.