vulkan: include precompiled shaders

compile-shaders/build-rs/src/main.rs

@@ -0,0 +1,25 @@
+use {
+    anyhow::bail,
+    compile_shaders_core::{ROOT, unchanged},
+    std::process::Command,
+};
+
+fn main() -> anyhow::Result<()> {
+    println!("cargo:rerun-if-changed={}", ROOT);
+    if unchanged() {
+        return Ok(());
+    }
+    let code = Command::new("cargo")
+        .args([
+            "run",
+            "--manifest-path",
+            "compile-shaders/Cargo.toml",
+            "-p",
+            "compile-shaders-compile",
+        ])
+        .status()?;
+    if !code.success() {
+        bail!("compile-shaders failed");
+    }
+    Ok(())
+}