Add new render function for raw wgpu. #729

Job	Run time
nix-flake-check (ubuntu-latest)	25s
nix-flake-check (macos-latest)	59s
cargo (cargo fmt --verbose --all -- --check)	1m 19s
nix-fmt-check	21s
cargo (cargo check --locked --workspace)	4m 8s
cargo (cargo check --locked --examples --workspace)	4m 30s
cargo (cargo test --locked --lib --bins --workspace --features "egui")	7m 20s
cargo (cargo doc --locked --workspace --features "egui")	16m 13s
cargo (cargo test --locked -p nannou_core --no-default-features --features "libm serde")	1m 10s
cargo (mdbook build guide/)	1m 7s
cargo (cargo test --locked -p book_tests)	6m 48s
verifications	1s
cargo-publish	0s
guide-push-to-deploy	0s
	44m 21s

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