Add login route with hardcoded password validation

lib/music_library_web/controllers/session_html/new.html.heex

@@ -0,0 +1,48 @@
+<div class="flex min-h-full items-center justify-center px-4 py-12 sm:px-6 lg:px-8">
+  <div class="w-full max-w-sm space-y-10">
+    <div>
+      <h2 class="mt-10 text-center text-2xl font-bold leading-9 tracking-tight text-gray-900">
+        Welcome to your Music Library
+      </h2>
+    </div>
+    <.form class="space-y-6" for={@form} action={~p"/sessions/create"}>
+      <div class="relative -space-y-px rounded-md shadow-sm">
+        <div>
+          <label for="password" class="sr-only">Password</label>
+          <input
+            id="password"
+            name="password"
+            type="password"
+            autocomplete="current-password"
+            required
+            class="relative block w-full rounded-b-md border-0 py-1.5 text-gray-900 ring-1 ring-inset ring-gray-100 placeholder:text-gray-400 focus:z-10 focus:ring-2 focus:ring-inset focus:ring-indigo-600 sm:text-sm sm:leading-6"
+            placeholder="Password"
+          />
+        </div>
+      </div>
+
+      <div class="flex items-center justify-between">
+        <div class="flex items-center">
+          <input
+            id="remember-me"
+            name="remember-me"
+            type="checkbox"
+            class="h-4 w-4 rounded border-gray-300 text-indigo-600 focus:ring-indigo-600"
+          />
+          <label for="remember-me" class="ml-3 block text-sm leading-6 text-gray-900">
+            Remember me
+          </label>
+        </div>
+      </div>
+
+      <div>
+        <button
+          type="submit"
+          class="flex w-full justify-center rounded-md bg-indigo-600 px-3 py-1.5 text-sm font-semibold leading-6 text-white hover:bg-indigo-500 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-indigo-600"
+        >
+          Sign in
+        </button>
+      </div>
+    </.form>
+  </div>
+</div>