feat: implement basic session authentication

templates/views/login.html

@@ -0,0 +1,9 @@
+<article>
+    <form hx-post="/login" hx-target="#content">
+        <label for="username">Username:</label>
+        <input type="text" id="username" name="username">
+        <label for="password">Password:</label>
+        <input type="password" id="password" name="password">
+        <input type="submit" value="Login">
+    </form>
+</article>