Added readline function, started work on shops, added some comments, made main menu and a bit of the start.

files/package-lock.json

@@ -0,0 +1,21 @@
+{
+  "name": "files",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "readline-sync": "^1.4.10"
+      }
+    },
+    "node_modules/readline-sync": {
+      "version": "1.4.10",
+      "resolved": "https://registry.npmjs.org/readline-sync/-/readline-sync-1.4.10.tgz",
+      "integrity": "sha512-gNva8/6UAe8QYepIQH/jQ2qn91Qj0B9sYjMBBs3QOB8F2CXcKgLxQaJRP76sWVRQt+QU+8fAkCbCvjjMFu7Ycw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8.0"
+      }
+    }
+  }
+}