chore: update app description

Signed-off-by: Edward Ly <[email protected]>

Author: edward-ly

appinfo/info.xml

@@ -3,7 +3,21 @@
 	<id>integration_zulip</id>
 	<name>Zulip Integration</name>
 	<summary>Integration of Zulip</summary>
-	<description><![CDATA[Zulip integration lets you send files to Zulip from Nextcloud Files.]]></description>
+	<description>
+	<![CDATA[
+This integration allows you to send Nextcloud files to your Zulip chat instance as uploaded files, public shared links, or internal shared links.
+
+## 🔧 Configuration
+
+### User settings
+
+Account configuration happens in the "Connected accounts" user settings section.
+It requires you to specify the URL of your Zulip instance, as well as the email address and API key associated with your Zulip account in that instance.
+These values can be found in and copied from your Zulip account's `zuliprc` file located in **Personal settings > Account & privacy > API key**.
+
+If those settings are not configured, a link to the "Connected accounts" user settings page will be displayed when attempting to send a file to a Zulip user/topic.
+The context menu to send a file can be accessed by right clicking on the file/folder to be shared or selecting them and clicking on the "Actions" button.
+	]]></description>
 	<version>1.0.2</version>
 	<licence>agpl</licence>
 	<author>Edward Ly</author>