Adding Getting Started section with Simple Example Provider subsection (#418)

Author: bendbennett

website/data/plugin-framework-nav-data.json

@@ -6,6 +6,15 @@
     "title": "Overview",
     "path": ""
   },
+  {
+    "title": "Getting Started",
+    "routes": [
+      {
+        "title": "Example Provider",
+        "path": "getting-started/example-provider"
+      }
+    ]
+  },
   {
     "title": "Learn Collection",
     "href": "https://learn.hashicorp.com/collections/terraform/providers-plugin-framework?utm_source=WEBSITE&utm_medium=WEB_IO&utm_offer=ARTICLE_PAGE&utm_content=DOCS"