Upload bob_flashcards.json

hf_data/flashcards/bob_flashcards.json

@@ -0,0 +1,4 @@
+[
+  {"id": "f1", "user_id": "bob", "front": "to be", "back": "ser/estar", "tags": ["verbs"]},
+  {"id": "f2", "user_id": "bob", "front": "have", "back": "ter", "tags": ["verbs"]}
+]