chore(layout): add edit link

Author: kruton

src/content/index.mdx

@@ -36,3 +36,9 @@ If you'd like to see ConnectBot translated into your language and you're willing
 <QRCode value="https://play.google.com/store/apps/details?id=org.connectbot" />
 
 You may also download ConnectBot from our [releases page](https://github.com/connectbot/connectbot/releases). Historical downloads may be available from the old Google Code site [downloads page](https://code.google.com/archive/p/connectbot/downloads).
+
+---
+
+<p style={{ textAlign: 'right', fontSize: '0.875rem' }}>
+  <a href="https://github.com/connectbot/connectbot.github.io/edit/develop/src/content/index.mdx">Edit this page on GitHub →</a>
+</p>

src/theme.config.tsx

@@ -18,7 +18,7 @@ const config = {
       </svg>
     ),
   },
-  docsRepositoryBase: 'https://github.com/connectbot/connectbot.github.io/tree/develop',
+  docsRepositoryBase: 'https://github.com/connectbot/connectbot.github.io/tree/develop/src/content',
   footer: (
     <div
       style={{
@@ -122,6 +122,7 @@ const config = {
   feedback: {
     content: 'Question? Give us feedback →',
     labels: 'feedback',
+    link: 'https://github.com/connectbot/connectbot.github.io/issues/new?labels=feedback',
   },
   sidebar: {
     defaultMenuCollapseLevel: 1,