chore(meta): Move challenge meta to challenges root

curriculum/challenges/_meta/css-flexbox/meta.json

@@ -0,0 +1,82 @@
+{
+  "name": "CSS Flexbox",
+  "dashedName": "css-flexbox",
+  "order": 5,
+  "time": "5 hours",
+  "template": "",
+  "required": [],
+  "superBlock": "responsive-web-design",
+  "superOrder": 1,
+  "challengeOrder": [
+    [
+      "587d78ab367417b2b2512af0",
+      "Use display: flex to Position Two Boxes"
+    ],
+    [
+      "587d78ab367417b2b2512af1",
+      "Add Flex Superpowers to the Tweet Embed"
+    ],
+    [
+      "587d78ab367417b2b2512af2",
+      "Use the flex-direction Property to Make a Row"
+    ],
+    [
+      "587d78ab367417b2b2512af3",
+      "Apply the flex-direction Property to Create Rows in the Tweet Embed"
+    ],
+    [
+      "587d78ac367417b2b2512af4",
+      "Use the flex-direction Property to Make a Column"
+    ],
+    [
+      "587d78ac367417b2b2512af5",
+      "Apply the flex-direction Property to Create a Column in the Tweet Embed"
+    ],
+    [
+      "587d78ac367417b2b2512af6",
+      "Align Elements Using the justify-content Property"
+    ],
+    [
+      "587d78ac367417b2b2512af7",
+      "Use the justify-content Property in the Tweet Embed"
+    ],
+    [
+      "587d78ad367417b2b2512af8",
+      "Align Elements Using the align-items Property"
+    ],
+    [
+      "587d78ad367417b2b2512af9",
+      "Use the align-items Property in the Tweet Embed"
+    ],
+    [
+      "587d78ad367417b2b2512afa",
+      "Use the flex-wrap Property to Wrap a Row or Column"
+    ],
+    [
+      "587d78ad367417b2b2512afb",
+      "Use the flex-shrink Property to Shrink Items"
+    ],
+    [
+      "587d78ae367417b2b2512afc",
+      "Use the flex-grow Property to Expand Items"
+    ],
+    [
+      "587d78ae367417b2b2512afd",
+      "Use the flex-basis Property to Set the Initial Size of an Item"
+    ],
+    [
+      "587d78ae367417b2b2512afe",
+      "Use the flex Shorthand Property"
+    ],
+    [
+      "587d78ae367417b2b2512aff",
+      "Use the order Property to Rearrange Items"
+    ],
+    [
+      "587d78af367417b2b2512b00",
+      "Use the align-self Property"
+    ]
+  ],
+  "helpRoom": "Help",
+  "fileName": "01-responsive-web-design/css-flexbox.json"
+}