Record visual conversion provenance and exclusions

provenance.json

@@ -0,0 +1,15 @@
+{
+  "source": "HuggingFaceM4/the_cauldron",
+  "revision": "847a98a779b1652d65111daf20c972dfcd333605",
+  "format_version": 1,
+  "splits": {
+    "train": {
+      "rows": 16423,
+      "questions": 18933
+    }
+  },
+  "conversion_sha256": "6981316be4910f7a27df7de522f864f053310b214f64fcdade231866ce06c743",
+  "excluded_rows": 10908,
+  "license": "cc-by-nc-sa-4.0",
+  "license_url": "https://github.com/lupantech/IconQA#license"
+}