refactor(go): standardize function names to lowercase and remove package declaration

Author: ineBallardin

go/Hash Maps and Sets/geometric_sequence_triplets.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func GeometricSequenceTriplets(nums []int, r int) int {
+func geometricSequenceTriplets(nums []int, r int) int {
 	// Use 'map' to ensure the default value of 0 is returned when
 	// accessing a key that doesn’t exist in the hash map. This effectively sets
 	// the default frequency of all elements to 0.

go/Hash Maps and Sets/longest_chain_of_consecutive_numbers.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func LongestChainOfConsecutiveNumbers(nums []int) int {
+func longestChainOfConsecutiveNumbers(nums []int) int {
 	if len(nums) == 0 {
 		return 0
 	}

go/Hash Maps and Sets/longest_chain_of_consecutive_numbers_brute_force.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func LongestChainOfConsecutiveNumbersBruteForce(nums []int) int {
+func longestChainOfConsecutiveNumbersBruteForce(nums []int) int {
 	if len(nums) == 0 {
 		return 0
 	}

go/Hash Maps and Sets/pair_sum_unsorted.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func PairSumUnsorted(nums []int, target int) []int {
+func pairSumUnsorted(nums []int, target int) []int {
 	hashmap := make(map[int]int)
 	for i, x := range nums {
 		complement := target - x

go/Hash Maps and Sets/pair_sum_unsorted_two_pass.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func PairSumUnsortedTwoPass(nums []int, target int) []int {
+func pairSumUnsortedTwoPass(nums []int, target int) []int {
 	numMap := make(map[int]int)
 	// First pass: Populate the hash map with each number and its index.
 	for i, num := range nums {

go/Hash Maps and Sets/verify_sudoku_board.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func VerifySudokuBoard(board [][]int) bool {
+func verifySudokuBoard(board [][]int) bool {
 	// Create hash sets for each row, column, and subgrid to keep
 	// track of numbers previously seen on any given row, column, or
 	// subgrid.

go/Hash Maps and Sets/zero_striping.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func ZeroStriping(matrix [][]int) {
+func zeroStriping(matrix [][]int) {
 	if len(matrix) == 0 || len(matrix[0]) == 0 {
 		return
 	}

go/Hash Maps and Sets/zero_striping_hash_sets.go

@@ -1,6 +1,4 @@
-package hashmapsandsets
-
-func ZeroStripingHashSets(matrix [][]int) {
+func zeroStripingHashSets(matrix [][]int) {
 	if len(matrix) == 0 || len(matrix[0]) == 0 {
 		return
 	}