Add citric_acid_species dataset

citric_acid_species/data/train-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:0d385bd546150f02e21c54c2fd9a9e5d8b370ff087efb3c396023a79fe3ccd2b
+size 8024440

citric_acid_species/metadata.json

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+{
+  "target_names": [
+    "Citric acid (CA)",
+    "Citrate 1 (CA-)"
+  ],
+  "task_type": 2
+}