Support rust analysis

This is supposed to enable rust analysis for the staff ship only.

tests/multi-language-repo/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "test"
+version = "0.0.1"

tests/multi-language-repo/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "test"
+version = "0.0.1"
+edition = "2021"
+[[bin]]
+name = "main"
+path = "main.rs"
+

tests/multi-language-repo/main.rs

@@ -0,0 +1,6 @@
+fn main() {
+  if true {
+    println!("Hello world!")
+  }
+}
+