Add AppData manifest, icon and desktop file for Flatpak package

data/com.github.cjbassi.ytop.appdata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 2020 Artem Polishchuk <ego.cordatus@gmail.com> -->
+<component type="console-application">
+  <id>com.github.cjbassi.ytop</id>
+
+  <name>ytop</name>
+  <summary>A TUI system monitor written in Rust</summary>
+
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>MIT</project_license>
+
+  <description>
+    <p>
+      Another TUI based system monitor, this time in Rust!
+    </p>
+  </description>
+
+  <categories>
+    <category>System</category>
+    <category>Monitor</category>
+  </categories>
+
+  <provides>
+    <binary>ytop</binary>
+  </provides>
+
+  <url type="homepage">https://github.com/cjbassi/ytop</url>
+  <url type="bugtracker">https://github.com/cjbassi/ytop/issues</url>
+
+  <screenshots>
+    <screenshot type="default">
+      <image>https://raw.githubusercontent.com/cjbassi/ytop/master/assets/screenshots/minimal.png</image>
+    </screenshot>
+    <screenshot type="default">
+      <image>https://raw.githubusercontent.com/cjbassi/ytop/master/assets/screenshots/battery.png</image>
+    </screenshot>
+  </screenshots>
+
+  <content_rating type="oars-1.0">
+    <content_attribute id="drugs-alcohol">none</content_attribute>
+    <content_attribute id="drugs-narcotics">none</content_attribute>
+    <content_attribute id="drugs-tobacco">none</content_attribute>
+    <content_attribute id="language-discrimination">none</content_attribute>
+    <content_attribute id="language-humor">none</content_attribute>
+    <content_attribute id="language-profanity">none</content_attribute>
+    <content_attribute id="money-gambling">none</content_attribute>
+    <content_attribute id="money-purchasing">none</content_attribute>
+    <content_attribute id="sex-nudity">none</content_attribute>
+    <content_attribute id="sex-themes">none</content_attribute>
+    <content_attribute id="social-audio">none</content_attribute>
+    <content_attribute id="social-chat">none</content_attribute>
+    <content_attribute id="social-contacts">none</content_attribute>
+    <content_attribute id="social-info">none</content_attribute>
+    <content_attribute id="social-location">none</content_attribute>
+    <content_attribute id="violence-bloodshed">none</content_attribute>
+    <content_attribute id="violence-cartoon">none</content_attribute>
+    <content_attribute id="violence-fantasy">none</content_attribute>
+    <content_attribute id="violence-realistic">none</content_attribute>
+    <content_attribute id="violence-sexual">none</content_attribute>
+  </content_rating>
+
+  <releases>
+    <release date="2020-04-22" version="0.6.0">
+    </release>
+    <release date="2020-02-17" version="0.5.1">
+    </release>
+   </releases>
+
+</component>

data/com.github.cjbassi.ytop.desktop

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+[Desktop Entry]
+Name=ytop
+Exec=ytop
+Type=Application
+Icon=com.github.cjbassi.ytop
+Comment=A TUI system monitor written in Rust
+Terminal=true