Move leftover docs in `docs/` to website (#1325)

docs/tutorial.md

@@ -1 +0,0 @@
-Tutorial has been moved to cadl website https://microsoft.github.io/cadl

packages/website/docs/extending-cadl/writing-scaffolding-template.md

@@ -1,3 +1,7 @@
+---
+title: Scaffolding templates
+---
+
 # Writting a scaffolding template
 
 cadl provides scaffolding functionality via the `cadl init` command.

packages/website/docs/getting-started/cadl-for-openapi-dev.md

@@ -1,3 +1,7 @@
+---
+title: Cadl For OpenAPI Developer
+---
+
 # Cadl for the OpenAPI developer
 
 This guide is an introduction to Cadl using concepts that will be familiar to developers

packages/website/sidebars.js

@@ -23,7 +23,7 @@ const sidebars = {
     {
       type: "category",
       label: "Getting Started",
-      items: ["getting-started/getting-started"],
+      items: ["getting-started/getting-started", "getting-started/cadl-for-openapi-dev"],
     },
     {
       type: "category",
@@ -75,6 +75,7 @@ const sidebars = {
         "extending-cadl/create-decorators",
         "extending-cadl/linters",
         "extending-cadl/emitters",
+        "extending-cadl/writing-scaffolding-template",
       ],
     },
     {