Add sub_handcrafted eval set (Quirke handcrafted)

sub_handcrafted/config.json

@@ -0,0 +1,5 @@
+{
+  "type": "handcrafted",
+  "source": "Quirke et al. quanta_maths",
+  "n_examples": 68
+}

sub_handcrafted/test.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:acb96ae41d59ce7cf9f3cbc24926b2566ef607553408f3b6d8aa5374143b32c9
+size 10164