Add appdata

Murmur.qbs

@@ -45,6 +45,12 @@ QtApplication {
 		qbs.installDir: "share/icons/hicolor/scalable/apps"
 	}
 
+	Group {
+		files: ["com.github.harmony-development.Murmur.appdata.xml"]
+		qbs.install: qbs.targetOS.contains("linux")
+		qbs.installDir: "share/metainfo"
+	}
+
 	Group {
 		files: ["com.github.harmony-development.Murmur.desktop"]
 		qbs.install: qbs.targetOS.contains("linux")

com.github.harmony-development.Murmur.appdata.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2019 Carson Black -->
+<component type="desktop-application">
+	<id>com.github.harmony-development.Murmur</id>
+	<icon type="remote" width="128" height="128">https://raw.githubusercontent.com/harmony-development/Murmur/main/resources/com.github.harmony-development.Murmur.svg</icon>
+	<name>Murmur</name>
+	<summary>Murmur is a desktop client for Harmony</summary>
+	<description>
+		<p>Murmur is a lightweight yet beautiful desktop client for the Harmony chat protocol.</p>
+	</description>
+	<metadata_license>CC0-1.0</metadata_license>
+	<project_license>AGPL-3.0-or-later</project_license>
+	<releases>
+		<release version="1.0" date="2020-11-16" urgency="high">
+			<description>
+				<p>First version of Murmur.</p>
+			</description>
+		</release>
+	</releases>
+	<update_contact>
+		uhhadd@gmail.com
+	</update_contact>
+	<url type="homepage">https://github.com/harmony-development/Murmur</url>
+	<screenshots>
+		<screenshot>
+			<caption>Murmur in the main chat view</caption>
+			<image type="source">https://raw.githubusercontent.com/harmony-development/Murmur/main/screenshots/Main.png</image>
+		</screenshot>
+		<screenshot>
+			<caption>Murmur's login screen</caption>
+			<image type="source">https://raw.githubusercontent.com/harmony-development/Murmur/main/screenshots/Login.png</image>
+		</screenshot>
+	</screenshots>
+	<categories>
+		<category>Network</category>
+	</categories>
+</component>