feat(nix): add style linter scaffold

src/nix-style-linter/BUILD

@@ -0,0 +1,21 @@
+load("@rules_rust//rust:defs.bzl", "rust_binary", "rust_library", "rust_test")
+
+rust_library(
+    name = "nix_style_linter_lib",
+    crate_name = "nix_style_linter",
+    srcs = ["lib.rs"],
+    deps = ["//third_party/crates:rnix"],
+)
+
+rust_binary(
+    name = "nix-style-linter",
+    crate_name = "nix_style_linter_cli",
+    srcs = ["main.rs"],
+    deps = [":nix_style_linter_lib"],
+)
+
+rust_test(
+    name = "lib_test",
+    srcs = ["lib_test.rs"],
+    deps = [":nix_style_linter_lib"],
+)