Add a link to docs.turbowarp.org/packager

src/locales/en.json

@@ -39,6 +39,10 @@
     "sourceCode": {
       "string": "Source Code"
     },
+    "documentation": {
+      "string": "Additional resources and help",
+      "context": "Link to a place with additional information describing advanced topics"
+    },
     "fosshost": {
       "string": "File hosting provided by Fosshost"
     }

src/p4/P4.svelte

@@ -181,6 +181,9 @@
       <span class="footer-spacer">-</span>
       <a href={SOURCE_CODE}>{$_('p4.sourceCode')}</a>
     </div>
+    <div>
+      <a href="https://docs.turbowarp.org/packager">{$_('p4.documentation')}</a>
+    </div>
     <div>
       <a href="https://fosshost.org/">{$_('p4.fosshost')}</a>
     </div>