chore: add package level comments

solutions/36/q3606/solution.go

@@ -1,3 +1,4 @@
+// Package q3606 implements a solution for https://leetcode.com/problems/coupon-code-validator/
 package q3606
 
 import (

solutions/36/q3634/solution.go

@@ -1,3 +1,4 @@
+// Package q3634 implements a solution for https://leetcode.com/problems/minimum-removals-to-balance-array/
 package q3634
 
 import "slices"

solutions/36/q3637/solution.go

@@ -1,3 +1,4 @@
+// Package q3637 implements a solution for https://leetcode.com/problems/trionic-array-i/
 package q3637
 
 func isTrionic(nums []int) bool {

solutions/36/q3640/solution.go

@@ -1,3 +1,4 @@
+// Package q3640 implements a solution for https://leetcode.com/problems/trionic-array-ii/
 package q3640
 
 import "math"

solutions/36/q3650/solution.go

@@ -1,3 +1,4 @@
+// Package q3650 implements a solution for https://leetcode.com/problems/minimum-cost-path-with-edge-reversals/
 package q3650
 
 func minCost(n int, edges [][]int) int {

solutions/36/q3651/solution.go

@@ -1,3 +1,4 @@
+// Package q3651 implements a solution for https://leetcode.com/problems/minimum-cost-path-with-teleportations/
 package q3651
 
 import (