feat: integrate authentication on word editor page (#11)

This Pull Request integrates authentication on the word editor page at
`/editor`; this means a user is required to login via github oauth flow
in order to access this page. When a user tries to access this page and
they are not authenticated, they get redirected to the `/login` page
where they're requested to authorize via github oauth flow and back to
the `editor` after they complete authorization.

### Changes Made 

- Integrated the `doAuth` action in the word editor page on the server
side.
    
    ```js
    // src/pages/editor/index.astro
    
    const { url: { pathname }, redirect } = Astro;
    const { isAuthed, authedData: userData } = await doAuth(Astro);
    if (!isAuthed) return redirect(`/login?redirect=${pathname}`);
    $userData.set(userData);
    ```
- Fixed a tiny change in the `word-editor` for accessibility

### Screencast/Screenshot


[screencast-bpconcjcammlapcogcnnelfmaeghhagj-2024.03.30-19_18_45.webm](https://github.com/babblebey/jargons.dev/assets/25631971/b8775272-f343-4cde-857e-1a36635768ac)

📖

Author: babblebey

src/components/islands/word-editor.jsx

@@ -57,9 +57,11 @@ function Preview({ className, ...props }) {
 
         <div className="max-w-4xl space-y-8 mx-auto">
           <div className="w-full">
-            <h1 className="text-4xl font-black">
-              { title }
-            </h1>
+            {title && (
+              <h1 className="text-4xl font-black">
+                { title }
+              </h1>
+            )}
           </div>
 
           <article className="w-full max-w-screen-lg prose">

src/pages/editor/index.astro

@@ -1,7 +1,15 @@
 ---
+import doAuth from "../../lib/actions/do-auth";
+import { $userData } from "../../stores/user.js";
 import BaseLayout from "../../layouts/base.astro";
 import Navbar from "../../components/navbar.astro";
 import WordEditor from "../../components/islands/word-editor.jsx";
+
+const { url: { pathname }, redirect } = Astro;
+const { isAuthed, authedData: userData } = await doAuth(Astro);
+if (!isAuthed) return redirect(`/login?redirect=${pathname}`);
+// @ts-expect-error
+$userData.set(userData);
 ---
 
 <BaseLayout