feat: ✨ add application version in settings

This commit adds the application version in the settings, to inform the user about the currently
running version.

closes: https://github.com/users/bk20dev/projects/1?pane=issue&itemId=68275373

app/src/main/res/values/strings.xml

@@ -81,4 +81,7 @@
     <string name="github" translatable="false">GitHub</string>
     <string name="github_summary">Check out our GitHub repository and help us improve the app</string>
     <string name="github_repository_url" translatable="false">https://github.com/bk20dev/forest</string>
+    <string name="version">Version: v1.0.0</string>
+    <string name="version_summary">The current version of the app</string>
+    <string name="github_releases_url" translatable="false">https://github.com/bk20dev/forest/releases</string>
 </resources>

app/src/main/res/xml/settings.xml

@@ -49,6 +49,16 @@
 
         </Preference>
 
+        <Preference
+            android:summary="@string/version_summary"
+            android:title="@string/version">
+
+            <intent
+                android:action="android.intent.action.VIEW"
+                android:data="@string/github_releases_url" />
+
+        </Preference>
+
     </PreferenceCategory>
 
 </PreferenceScreen>