add automated screenshots, fastlane metadata, and appstream metainfo

Fixes #174, fixes #173, fixes #172

linux/nexus.federated.nexus.metainfo.xml

@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>nexus.federated.nexus</id>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0-only</project_license>
+
+  <name>Nexus</name>
+  <summary>A simple and user-friendly Matrix client</summary>
+  <developer id="nexus.federated">
+    <name>QuadRadical</name>
+  </developer>
+
+  <description>
+    <p>
+      Nexus is a simple and user-friendly client for Matrix, the open and
+      decentralized chat network. It's made with Flutter, with gomuks handling
+      the Matrix side.
+    </p>
+    <p>Features include:</p>
+    <ul>
+      <li>Spaces, threads, replies and reactions</li>
+      <li>End-to-end encryption, with verification and recovery keys</li>
+      <li>Polls, location sharing, and custom emoji and sticker packs</li>
+      <li>Multiple accounts</li>
+      <li>Notifications through UnifiedPush</li>
+      <li>Layouts for phones and desktops, including Linux phones</li>
+    </ul>
+  </description>
+
+  <launchable type="desktop-id">nexus.federated.nexus.desktop</launchable>
+
+  <url type="homepage">https://git.federated.nexus/Nexus/nexus</url>
+  <url type="bugtracker">https://git.federated.nexus/Nexus/nexus/issues</url>
+  <url type="vcs-browser">https://git.federated.nexus/Nexus/nexus</url>
+
+  <!-- Generated by `nix run .#screenshots` -->
+  <screenshots>
+    <screenshot type="default">
+      <caption>Chatting in a room, with its members</caption>
+      <image>https://git.federated.nexus/Nexus/nexus/raw/branch/main/assets/screenshots/desktop-light.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>The same, in dark mode</caption>
+      <image>https://git.federated.nexus/Nexus/nexus/raw/branch/main/assets/screenshots/desktop-dark.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Chatting on a phone</caption>
+      <image>https://git.federated.nexus/Nexus/nexus/raw/branch/main/fastlane/metadata/android/en-US/images/phoneScreenshots/1.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Spaces and rooms on a phone</caption>
+      <image>https://git.federated.nexus/Nexus/nexus/raw/branch/main/fastlane/metadata/android/en-US/images/phoneScreenshots/3.png</image>
+    </screenshot>
+  </screenshots>
+
+  <requires>
+    <display_length compare="ge">360</display_length>
+  </requires>
+  <supports>
+    <control>keyboard</control>
+    <control>pointing</control>
+    <control>touch</control>
+  </supports>
+
+  <content_rating type="oars-1.1">
+    <content_attribute id="social-chat">intense</content_attribute>
+    <content_attribute id="social-location">intense</content_attribute>
+  </content_rating>
+
+  <releases>
+    <release version="1.1.0" date="2026-11-11"/>
+    <release version="1.0.1" date="2026-10-25"/>
+    <release version="1.0.0" date="2026-10-22"/>
+  </releases>
+</component>