feat: add about module

src/app/modules/about/about-changelog.html

@@ -0,0 +1,28 @@
+<!--
+  ~ Copyright (C) 2021 StApps
+  ~ This program is free software: you can redistribute it and/or modify it
+  ~ under the terms of the GNU General Public License as published by the Free
+  ~ Software Foundation, version 3.
+  ~
+  ~ This program is distributed in the hope that it will be useful, but WITHOUT
+  ~ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  ~ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+  ~ more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License along with
+  ~ this program. If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<ion-header>
+  <ion-toolbar>
+    <ion-buttons slot="start">
+      <ion-menu-button></ion-menu-button>
+      <ion-back-button></ion-back-button>
+    </ion-buttons>
+    <ion-title>Changelog</ion-title>
+    <!-- TODO: translation -->
+  </ion-toolbar>
+</ion-header>
+<ion-content>
+  <markdown src="assets/about/CHANGELOG.md"></markdown>
+</ion-content>