Docusarus: Init Project

Summary:
This starts us transitioning the Yoga website off of an ancient version of Gatsby by initializing a new Docusaurus project. This commit adds a new stock project, to be filled in later, then fixes license lint errors.

Note that this seems to have init'd using npm, but in the next diff I convert this to yarn workspaces anyway.

Differential Revision: D46884434

fbshipit-source-id: 26e2ecba057ae99c4ef878e4cd21c8d21a25c2b5

website-next/.docusaurus/i18n.json

@@ -0,0 +1,17 @@
+{
+  "defaultLocale": "en",
+  "locales": [
+    "en"
+  ],
+  "path": "i18n",
+  "currentLocale": "en",
+  "localeConfigs": {
+    "en": {
+      "label": "English",
+      "direction": "ltr",
+      "htmlLang": "en",
+      "calendar": "gregory",
+      "path": "en"
+    }
+  }
+}