Add new render function for raw wgpu. #727

Job	Run time
nix-flake-check (ubuntu-latest)	27s
nix-fmt-check	23s
nix-flake-check (macos-latest)	1m 4s
cargo (cargo fmt --verbose --all -- --check)	59s
cargo (cargo check --locked --workspace)	4m 18s
cargo (cargo check --locked --examples --workspace)	3m 21s
cargo (cargo test --locked --lib --bins --workspace --features "egui")	7m 17s
cargo (cargo doc --locked --workspace --features "egui")	16m 19s
cargo (cargo test --locked -p nannou_core --no-default-features --features "libm serde")	1m 33s
cargo (mdbook build guide/)	1m 35s
cargo (cargo test --locked -p book_tests)	6m 42s
verifications	0s
cargo-publish	0s
guide-push-to-deploy	0s
	43m 58s

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