Added rust to devShell

shell-modules/languages/rust.nix

@@ -0,0 +1,34 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+
+with lib;
+let
+  rustPackage = pkgs.rustc;
+in
+{
+  options.rust = {
+    enable = mkEnableOption "Rust";
+    # TODO: Add option to specify toolchain file
+    # See https://ayats.org/blog/nix-rustup
+  };
+
+  config = mkIf config.rust.enable {
+    packages = [
+      bacon
+      evcxr
+      cargo
+
+      rustPackage
+
+      # TODO: Might be needed for bindgen
+      # rustPlatform.bindgenHook
+      # pkg-config
+    ];
+
+    # env.RUST_SRC_PATH = "${rustPackage}/lib/rustlib/src/rust/library";
+  };
+}