add package for 'biri', a fork of niri with PRs merged

modules/dev-shells/rust.nix

@@ -0,0 +1,17 @@
+{ inputs, self, ... }: {
+  perSystem = { pkgs, ... }: {
+    devShells.rust = with pkgs; mkShell {
+      name = "rust-dev-shell";
+      strictDeps = true;
+
+      nativeBuildInputs = [
+        rustc
+        cargo
+        pkg-config
+        rustPlatform.bindgenHook
+      ];
+
+      RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";
+    };
+  };
+}