Flatten out structure of best practices (#354)

* Flatten out structure of best practices

* Customize best practices page and add category links

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Co-authored-by: Sam Kim <[email protected]>

Author: tstirrat15

pages/best-practices/_meta.json

@@ -1,3 +1,23 @@
 {
-  "best-practices": "Best Practices"
+  "index": {
+    "title": "Best Practices",
+    "theme": {
+      "breadcrumb": false,
+      "sidebar": true,
+      "toc": true,
+      "pagination": false
+    }
+  },
+  "priority": {
+    "title": "Essential",
+    "href": "#priority-a-essential"
+  },
+  "strongly-recommended": {
+    "title": "Strongly Recommended",
+    "href": "#priority-b-strongly-recommended"
+  },
+  "recommended": {
+    "title": "Recommended",
+    "href": "#priority-c-recommended"
+  }
 }