Add package.xml (#613)

Signed-off-by: Addisu Z. Taddese <addisu@openrobotics.org>

Author: azeey

.github/workflows/package_xml.yml

@@ -0,0 +1,11 @@
+name: Validate package.xml
+
+on:
+  pull_request:
+
+jobs:
+  package-xml:
+    runs-on: ubuntu-latest
+    name: Validate package.xml
+    steps:
+      - uses: gazebo-tooling/action-gz-ci/validate_package_xml@jammy

package.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0"?>
+<?xml-model href="http://download.ros.org/schema/package_format2.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
+<package format="2">
+  <name>gz-gui8</name>
+  <version>8.1.1</version>
+  <description>Gazebo GUI : Graphical interfaces for robotics applications</description>
+  <maintainer email="jennuine@google.com">Jenn Nguyen</maintainer>
+  <license>Apache License 2.0</license>
+  <url type="website">https://github.com/gazebosim/gz-rendering</url>
+
+  <buildtool_depend>cmake</buildtool_depend>
+
+  <build_depend>gz-cmake3</build_depend>
+
+  <depend>gz-common5</depend>
+  <depend>gz-math7</depend>
+  <depend>gz-msgs10</depend>
+  <depend>gz-plugin2</depend>
+  <depend>gz-rendering8</depend>
+  <depend>gz-tools2</depend>
+  <depend>gz-transport13</depend>
+  <depend>gz-utils2</depend>
+  <depend>libqt5-core</depend>
+  <depend>libqt5-qml</depend>
+  <depend>libqt5-quick</depend>
+  <depend>libqt5-widgets</depend>
+  <depend>protobuf-dev</depend>
+  <depend>qml-module-qt-labs-folderlistmodel</depend>
+  <depend>qml-module-qt-labs-platform</depend>
+  <depend>qml-module-qt-labs-settings</depend>
+  <depend>qml-module-qtcharts</depend>
+  <depend>qml-module-qtgraphicaleffects</depend>
+  <depend>qml-module-qtlocation</depend>
+  <depend>qml-module-qtpositioning</depend>
+  <depend>qml-module-qtquick-controls2</depend>
+  <depend>qml-module-qtquick-controls</depend>
+  <depend>qml-module-qtquick-dialogs</depend>
+  <depend>qml-module-qtquick-extras</depend>
+  <depend>qml-module-qtquick-layouts</depend>
+  <depend>qml-module-qtquick-templates2</depend>
+  <depend>qml-module-qtquick-window2</depend>
+  <depend>qml-module-qtquick2</depend>
+  <depend>qtbase5-dev</depend>
+  <depend>qtdeclarative5-dev</depend>
+  <depend>qtquickcontrols2-5-dev</depend>
+  <depend>tinyxml2</depend>
+
+  <test_depend>xvfb</test_depend>
+
+  <export>
+    <build_type>cmake</build_type>
+  </export>
+</package>