Add flatpak data.

Author: wojciech-graj

flatpak/128x128/io.github.wojciech_graj.OrbVis.png

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>io.github.wojciech_graj.OrbVis</id>
+
+  <name>OrbVis</name>
+  <summary>A Realtime Satellite Orbit Visualizer</summary>
+
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-2.0-or-later</project_license>
+
+  <content_rating type="oars-1.1" />
+  <url type="homepage">https://github.com/wojciech-graj/OrbVis</url>
+
+  <description>
+    <p>
+      OrbVis is a tool used to view and propagate the full CelesTrak satellite catalog in realtime.
+    </p>
+  </description>
+
+  <launchable type="desktop-id">io.github.wojciech_graj.OrbVis.desktop</launchable>
+  <screenshots>
+    <screenshot type="default">
+      <image>https://raw.githubusercontent.com/wojciech-graj/OrbVis/master/screenshot/scr02.png</image>
+    </screenshot>
+    <screenshot>
+      <image>https://raw.githubusercontent.com/wojciech-graj/OrbVis/master/screenshot/scr03.png</image>
+    </screenshot>
+    <screenshot>
+      <image>https://raw.githubusercontent.com/wojciech-graj/OrbVis/master/screenshot/scr04.png</image>
+    </screenshot>
+  </screenshots>
+
+  <releases>
+    <release version="v0.2.2" date="2023-03-27">
+      <description>
+        <p>Initial flatpak release.</p>
+      </description>
+    </release>
+  </releases>
+</component>

flatpak/io.github.wojciech_graj.OrbVis.appdata.xml

@@ -0,0 +1,11 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+
+Name=OrbVis
+Comment=A Realtime Satellite Orbit Visualizer
+Categories=Science;Astronomy;
+
+Icon=io.github.wojciech_graj.OrbVis
+Exec=orbvis
+Terminal=false

flatpak/io.github.wojciech_graj.OrbVis.desktop

@@ -1,7 +1,7 @@
 project(
   'OrbVis',
   'c',
-  version : '0.2.2',
+  version : '0.2.3',
   license : 'GPL-2.0-or-later',
   default_options : [
     'c_std=c11',