chore: fix metainfo file for flathub publication (#726)

it.unibo.tuprolog.ide.metainfo.xml

@@ -1,23 +1,52 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <component type="desktop-application">
   <id>it.unibo.tuprolog.ide</id>
-  
+
   <name>tuProlog IDE</name>
   <summary>An IDE for using Prolog via 2p-kt</summary>
 
   <url type="homepage">https://apice.unibo.it/xwiki/bin/view/Tuprolog/</url>
-  
+
   <metadata_license>CC-BY-SA-4.0</metadata_license>
   <project_license>Apache-2.0</project_license>
-  
+
   <description>
     <p>
       tuProlog (2P henceforth) is a multi-paradigm logic programming framework written in Java.
     </p>
     <p>
-      2P-Kt is a Kotlin-based and multi-platform reboot of 2P. It consists of an open ecosystem for Symbolic Artificial Intelligence (AI). For this reason, 2P-Kt consists of a number of incrementally inter-dependent modules aimed at supporting symbolic manipulation and reasoning in an extensible and flexible way.
+      2P-Kt is a Kotlin-based and multi-platform reboot of 2P. It consists of an open ecosystem for
+      Symbolic Artificial Intelligence (AI). For this reason, 2P-Kt consists of a number of
+      incrementally inter-dependent modules aimed at supporting symbolic manipulation and reasoning
+      in an extensible and flexible way.
     </p>
   </description>
-  
+
   <launchable type="desktop-id">it.unibo.tuprolog.ide.desktop</launchable>
+
+  <content_rating type="oars-1.1" />
+
+  <developer id="it.unibo.tuprolog.ide">
+    <name>University of Bologna - tuProlog Developers</name>
+  </developer>
+
+  <screenshots>
+    <screenshot type="default">
+      <image>https://raw.githubusercontent.com/tuProlog/2p-kt/7a1b127a10a084793da74e275d598f3c482be9c0/.img/2p-kt-ide.png</image>
+      <caption>TuProlog IDE with a simple program and the about dialog</caption>
+    </screenshot>
+  </screenshots>
+
+  <releases>
+    <release version="1.0.4" date="2024-05-26">
+      <url type="details">https://github.com/tuProlog/2p-kt/releases/tag/1.0.4</url>
+      <description>
+        <p>Dependency updates</p>
+        <ul>
+            <li>Updated Gradle plugins</li>
+            <li>Updated PlantUML</li>
+        </ul>
+      </description>
+    </release>
+  </releases>
 </component>