Restructure GPU compilation execution pipeline (#903)

* Restructure gpu compilation execution pipeline

* Add compilation server/client infrastructure

* Add wgpu executor

node-graph/gpu-compiler/src/main.rs

@@ -0,0 +1,26 @@
+use graph_craft::document::NodeNetwork;
+use gpu_compiler as compiler;
+use std::io::Write;
+
+fn main() ->  anyhow::Result<()> {
+    println!("Starting Gpu Compiler!");
+	let mut stdin = std::io::stdin();
+	let mut stdout = std::io::stdout();
+	let input_type = std::env::args().nth(1).expect("input type arg missing");
+	let output_type = std::env::args().nth(2).expect("output type arg missing");
+	let compile_dir = std::env::args().nth(3).map(|x| std::path::PathBuf::from(&x)).unwrap_or(tempfile::tempdir()?.into_path());
+	let network: NodeNetwork = serde_json::from_reader(&mut stdin)?;
+	let compiler = graph_craft::executor::Compiler{};
+	let proto_network = compiler.compile(network, true);
+    dbg!(&compile_dir);
+
+	let metadata = compiler::Metadata::new("project".to_owned(), vec!["test@example.com".to_owned()]);
+
+	compiler::create_files(&metadata, &proto_network, &compile_dir, &input_type, &output_type)?;
+	let result = compiler::compile(&compile_dir)?;
+
+	let bytes = std::fs::read(result.module.unwrap_single())?;
+	stdout.write_all(&bytes)?;
+
+	Ok(())
+}