feat: showcase basic array functionality (#2253)

* feat: showcase basic array functionality

* feat: demo 0-index and `[]` retrieval on arrays

* feat: show that arrays can contain different types

* docs: document `.length` property on arrays

* fix: `eslint` errors

* style: make code compact by deleting empty lines

* refactor: remove third example

---------

Co-authored-by: Queen Vinyl Da.i'gyu-Kazotetsu <vinyldarkscratch@gmail.com>

live-examples/js-examples/array/array.js

@@ -0,0 +1,13 @@
+const names = [];
+names.push('Aisha');
+names.push('Bem');
+console.log(names); // [ 'Aisha', 'Bem' ]
+console.log(names[-1]); // undefined
+console.log(names[0]); // "Aisha"
+console.log(names[1]); // "Bem"
+console.log(names.length); // 2
+
+const top = names.pop();
+console.log(top); // 'Bem'
+console.log(names); // [ 'Aisha' ]
+console.log(names.length); // 1

live-examples/js-examples/array/meta.json

@@ -1,5 +1,11 @@
 {
   "pages": {
+    "array": {
+      "exampleCode": "./live-examples/js-examples/array/array.js",
+      "fileName": "array.html",
+      "title": "JavaScript Demo: Array",
+      "type": "js"
+    },
     "arrayAt": {
       "exampleCode": "./live-examples/js-examples/array/array-at.js",
       "fileName": "array-at.html",