Add fastlane metadata for F-Droid repository

fastlane/metadata/android/en-US/changelogs/15.txt

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+- Speed up full text search by searching only in the page titles in the first step

fastlane/metadata/android/en-US/changelogs/16.txt

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+- Add fastlane metadata for F-Droid repository

fastlane/metadata/android/en-US/full_description.txt

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+MoasdaWiki App is an extension of the MoasdaWiki Server to have a copy of your Wiki content on your mobile device.
+
+Features:
+
+- Synchronizes the data from a MoasdaWiki Server instance.
+- Data privacy: No cloud connection established, directly connects to the server inside your private network.
+- Powerful full text search, supports regular expressions.
+- Content cannot be modified within the app as it is no fun to type Wiki syntax on the mobile device, changes have to be done via the MoasdaWiki Server.
+- Calendar integration, shows birthdays and events in the mobile calendar (German version only).
+
+Synchronize content with a MoasdaWiki Server:
+
+1. Download MoasdaWiki Server from https://moasdawiki.net/.
+2. Set up a MoasdaWiki Server instance in your LAN.
+3. Install and open the MoasdaWiki App.
+4. You can see a hint that the App has to be configured first. Press on that hint.
+5. Press on "Host name" and enter the host name of the server instance, e.g. `192.168.1.101`. Press OK.
+6. In the status section below you should see "Needs authorization at server". Otherwise check host name and port again.
+7. On server side open the Wiki page in a browser, click on "Help" and "Synchronization".
+8. You can see a list of devices and synchronization sessions. Check the device name and click on "Grant".
+9. Back in the app press the back button (←) on the upper left corner to get back to the main dialog. Now you can see a hint that the app has to be synchronized. Press on that hint.
+10. Now you should have all the server content also in the app and you can see the "Home" wiki page.

fastlane/metadata/android/en-US/short_description.txt

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+App to synchronize data from MoasdaWiki Server.