Move functions to separate file

Author: kgryte

lib/node_modules/@stdlib/ndarray/ctor/manifest.json

@@ -25,8 +25,9 @@
 	"confs": [
 		{
 			"src": [
-				"./src/main.c",
-				"./src/iget.c"
+				"./src/get.c",
+				"./src/iget.c",
+				"./src/main.c"
 			],
 			"include": [
 				"./include"