feat(ariadne): deserialize Clew AST JSON

src/ariadne/BUILD

@@ -4,9 +4,14 @@ rust_library(
     name = "ariadne_lib",
     crate_name = "ariadne",
     srcs = [
+        "clew.rs",
         "lib.rs",
         "pipeline.rs",
     ],
+    deps = [
+        "//third_party/crates:serde",
+        "//third_party/crates:serde_json",
+    ],
 )
 
 rust_binary(
@@ -19,6 +24,15 @@ rust_binary(
     ],
 )
 
+rust_test(
+    name = "clew_test",
+    srcs = ["clew_test.rs"],
+    deps = [
+        ":ariadne_lib",
+        "//third_party/crates:serde_json",
+    ],
+)
+
 rust_test(
     name = "pipeline_test",
     srcs = ["pipeline_test.rs"],