Add FreeDesktop MetaInfo file (#315)

PACKAGING.md

@@ -29,7 +29,7 @@ In addition to the compiled binary, there are other files in the repo that
 you'll want to install as part of a package:
 
 | Repository Path         | Installed Path (may vary per OS)                |
-| --------------------   | ----------------------------------------------- |
+| ----------------------- | ----------------------------------------------- |
 | /iamb.desktop           | /usr/share/applications/iamb.desktop            |
 | /config.example.toml    | /usr/share/iamb/config.example.toml             |
 | /docs/iamb-256x256.png  | /usr/share/icons/hicolor/256x256/apps/iamb.png  |
@@ -37,6 +37,7 @@ you'll want to install as part of a package:
 | /docs/iamb.svg          | /usr/share/icons/hicolor/scalable/apps/iamb.svg |
 | /docs/iamb.1            | /usr/share/man/man1/iamb.1                      |
 | /docs/iamb.5            | /usr/share/man/man5/iamb.5                      |
+| /docs/iamb.metainfo.xml | /usr/share/metainfo/iamb.metainfo.xml           |
 
 [ring-lto]: https://github.com/briansmith/ring/issues/1444
 [rustls]: https://crates.io/crates/rustls

docs/iamb.metainfo.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="console-application">
+  <id>iamb</id>
+
+  <name>iamb</name>
+  <summary>A terminal Matrix client for Vim addicts</summary>
+  <url type="homepage">https://iamb.chat</url>
+
+  <releases>
+    <release version="0.0.9" date="2024-03-28"/>
+  </releases>
+
+  <developer id="dev.ulyssa">
+    <name>Ulyssa</name>
+  </developer>
+
+  <metadata_license>CC-BY-SA-4.0</metadata_license>
+  <project_license>Apache-2.0</project_license>
+
+  <content_rating type="oars-1.1">
+    <content_attribute id="social-chat">intense</content_attribute>
+  </content_rating>
+
+  <screenshots>
+    <screenshot type="default">
+      <image>https://iamb.chat/static/images/iamb-demo.gif</image>
+      <caption>Example conversation within iamb</caption>
+    </screenshot>
+  </screenshots>
+
+  <description>
+    <p>
+        iamb is a client for the Matrix communication protocol. It provides a
+        terminal user interface with familiar Vim keybindings, and includes
+        support for multiple profiles, threads, spaces, notifications,
+        reactions, custom keybindings, and more.
+    </p>
+  </description>
+
+  <icon type="remote">https://iamb.chat/images/iamb.svg</icon>
+  <launchable type="desktop-id">iamb.desktop</launchable>
+
+  <categories>
+    <category>Network</category>
+    <category>Chat</category>
+  </categories>
+
+  <provides>
+    <binary>iamb</binary>
+  </provides>
+</component>