Add JSON and Language validators for IFEval (#1078)

* added json and language validators for IFEval

* formatting

Author: farook-edev

WORKSPACE

@@ -60,6 +60,16 @@ http_archive(
     ],
 )
 
+http_archive(
+    name = "cld2",
+    build_file = "@//third_party:cld2.BUILD",
+    sha256 = "6d8681eadbb64d8fcd3c6c620e81bed16d99ff75627324d66ee2d54bf2b7d749",
+    strip_prefix = "cld2-b56fa78a2fe44ac2851bae5bf4f4693a0644da7b",
+    urls = [
+        "https://github.com/CLD2Owners/cld2/archive/b56fa78a2fe44ac2851bae5bf4f4693a0644da7b.zip",
+    ],
+)
+
 http_archive(
     name = "org_tensorflow",
     patch_args = ["-p1"],

flutter/cpp/datasets/ifeval_utils/BUILD

@@ -22,6 +22,7 @@ cc_library(
     name = "ifeval_utils",
     hdrs = [
         "common.h",
+        "json.h",
         "types.h",
     ],
     copts = select({
@@ -34,5 +35,6 @@ cc_library(
         "//conditions:default": [],
     }),
     deps = [
+        "@cld2",
     ],
 )