docs: add sidebar labels and reorganize solution docs into category folders

docs/solutions/(array)/875-koko-eating-bananas.mdx

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+---
+title: '875. Koko Eating Bananas'
+description: Koko loves to eat bananas. There are n piles of bananas, the i^th pile has piles[i] bananas. The guards have gone and will come back in h hours
+sidebar:
+  label: 'Koko Eating Bananas'
+  badge: 'Medium'
+---
+
+<Badge variant="accent">Binary Search</Badge>
+
+### Example 1:
+- Input: `piles = [3,6,7,11], h = 8`
+- Output: `4`
+
+### Example 2:
+- Input: `piles = [30,11,23,4,20], h = 5`
+- Output: `30`
+
+### Example 3:
+- Input: `piles = [30,11,23,4,20], h = 6`
+- Output: `23`
+
+### Constraints:
+
+- `1 <= piles.length <= 10^4`
+- `piles.length <= h <= 10^9`
+- `1 <= piles[i] <= 10^9`
+
+## Solution
+
+```js
+/**
+ * @param {number[]} piles
+ * @param {number} h
+ * @return {number}
+ */
+var minEatingSpeed = function(piles, h) {
+  // Function to determine if K works for the H
+   function kWorks(k){
+    let hours = 0;
+    for (let p of piles){
+      hours += Math.ceil(p/k)
+    }
+    return hours <= h;
+  }
+
+  // Setup Binary Search
+  let l = 1;
+  let r = Math.max(...piles);
+
+  // Find the K value which works for H and consumes all bananas
+  while (l < r){
+    const mid = Math.floor((l + r) / 2);
+    if (kWorks(mid)){
+      r = mid;
+    }else{
+      l = mid + 1;
+    }
+  }
+  return l;
+};
+```