feat: link translators to Weblate from the README and settings

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

@@ -263,11 +263,13 @@
     <string name="settings_about_logo_desc">Clockula app icon</string>
     <string name="settings_about_support">Support development</string>
     <string name="settings_about_source">Source</string>
+    <string name="settings_translate">Help translate</string>
     <string name="settings_license">License</string>
     <string name="settings_privacy">Privacy policy</string>
     <string name="settings_about_version">Version %1$s</string>
     <string name="about_source_url" translatable="false">https://codeberg.org/jlmakiola/clockula</string>
     <string name="about_license_url" translatable="false">https://codeberg.org/jlmakiola/clockula/src/branch/main/LICENSE</string>
+    <string name="about_translate_url" translatable="false">https://weblate.dev.jeanlucmakiola.de/engage/clockula/</string>
     <string name="about_privacy_url" translatable="false">https://jeanlucmakiola.de/clockula/privacy</string>
     <string name="about_support_url" translatable="false">https://ko-fi.com/jeanlucmakiola</string>
     <string name="settings_group_look">Look &amp; behaviour</string>