feat(content): function signatures + test cases

backend/data/questions/koko-eating-bananas.yaml

@@ -9,6 +9,30 @@ categories:
 patterns:
   - binary-search
 
+function_signature: "def min_eating_speed(piles: list[int], h: int) -> int:"
+
+test_cases:
+  visible:
+    - input: { piles: [3, 6, 7, 11], h: 8 }
+      expected: 4
+    - input: { piles: [30, 11, 23, 4, 20], h: 5 }
+      expected: 30
+    - input: { piles: [30, 11, 23, 4, 20], h: 6 }
+      expected: 23
+  hidden:
+    - input: { piles: [1], h: 1 }
+      expected: 1
+    - input: { piles: [1, 1, 1, 1], h: 4 }
+      expected: 1
+    - input: { piles: [1000000000], h: 2 }
+      expected: 500000000
+    - input: { piles: [312884470], h: 968709470 }
+      expected: 1
+    - input: { piles: [2, 2], h: 2 }
+      expected: 2
+    - input: { piles: [5, 10, 3], h: 4 }
+      expected: 6
+
 description: |
   Koko loves to eat bananas. There are `n` piles of bananas, the i<sup>th</sup> pile has `piles[i]` bananas. The guards have gone and will come back in `h` hours.