Initial Quartz setup for Castle Docs

docs/plugins/CNAME.md

@@ -0,0 +1,22 @@
+---
+title: CNAME
+tags:
+  - plugin/emitter
+---
+
+This plugin emits a `CNAME` record that points your subdomain to the default domain of your site.
+
+If you want to use a custom domain name like `quartz.example.com` for the site, then this is needed.
+
+See [[hosting|Hosting]] for more information.
+
+> [!note]
+> For information on how to add, remove or configure plugins, see the [[configuration#Plugins|Configuration]] page.
+
+This plugin has no configuration options.
+
+## API
+
+- Category: Emitter
+- Function name: `Plugin.CNAME()`.
+- Source: [`quartz/plugins/emitters/cname.ts`](https://github.com/jackyzha0/quartz/blob/v4/quartz/plugins/emitters/cname.ts).