chore: add package level comments

solutions/29/q2943/solution.go

@@ -1,3 +1,4 @@
+// Package q2943 implements a solution for https://leetcode.com/problems/maximize-area-of-square-hole-in-grid/
 package q2943
 
 import "slices"

solutions/29/q2975/solution.go

@@ -1,3 +1,4 @@
+// Package q2975 implements a solution for https://leetcode.com/problems/maximum-square-area-by-removing-fences-from-a-field/
 package q2975
 
 import "slices"

solutions/29/q2976/solution.go

@@ -1,3 +1,4 @@
+// Package q2976 implements a solution for https://leetcode.com/problems/minimum-cost-to-convert-string-i/
 package q2976
 
 import "math"

solutions/29/q2977/solution.go

@@ -1,3 +1,4 @@
+// Package q2977 implements a solution for https://leetcode.com/problems/minimum-cost-to-convert-string-ii/
 package q2977
 
 import "math"