feat: add helpers.c template for function definitions

Author: harshsankhla18

helpers.c

@@ -0,0 +1,29 @@
+#include "helper.h"
+
+
+void grayscale(int height, int width, RGBTRIPLE image[height][width]){
+
+// Convert image to grayscale
+
+}
+
+
+void sepia(int height, int width, RGBTRIPLE image[height][width]){
+
+// Convert image to sepia
+
+}
+
+
+void reflect(int height, int width, RGBTRIPLE image[height][width]){
+
+// Reflect image horizontally
+
+}
+
+
+void blur(int height, int width, RGBTRIPLE image[height][width]){
+
+// Blur image
+
+}