Added the initial application with the main account list, the pagination, the query, the permission, the localization, the documentation, the test case, and a test demonstration site.

tests/testsite/templates/login.html

@@ -0,0 +1,35 @@
+{#
+The Mia! Accounting Flask Demonstration Website
+login.html: The login page.
+
+ Copyright (c) 2023 imacat.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+Author: imacat@mail.imacat.idv.tw (imacat)
+First written: 2023/1/27
+#}
+{% extends "base.html" %}
+
+{% block header %}{% block title %}{{ _("Log In") }}{% endblock %}{% endblock %}
+
+{% block content %}
+
+<form action="{{ url_for("auth.login") }}" method="post">
+  <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+  <button class="btn btn-primary" type="submit" name="username" value="viewer">{{ _("Viewer") }}</button>
+  <button class="btn btn-primary" type="submit" name="username" value="editor">{{ _("Editor") }}</button>
+  <button class="btn btn-primary" type="submit" name="username" value="nobody">{{ _("Nobody") }}</button>
+</form>
+
+{% endblock %}