chore: create robots.txt (#14)

Author: RoyalOughtness

_includes/meta.html

@@ -1,6 +1,7 @@
 <meta charset="utf-8"/>
 
 <title>{{ page.title }}</title>
+<meta name='robots' content='noindex,nofollow' />
 <meta name="description" content="{{ page.description }}"/>
 
 <meta name="theme-color" content="#241f31"/>
@@ -29,4 +30,4 @@
 
 <link rel="stylesheet" href="/assets/main.css"/>
 
-<link rel="manifest" href="/assets/manifest.webmanifest" />
+<link rel="manifest" href="/assets/manifest.webmanifest" />