[Linux] Add MimeType for appimage and metainfo file support

examples/hello_world/linux/packaging/appimage/make_config.yaml

@@ -10,6 +10,12 @@ keywords:
 
 generic_name: Cool Application
 
+# supported mime types that can be opened using this application
+# supported_mime_type:
+#   - audio/mpeg
+
+metainfo: linux/packaging/helloworld.appdata.xml
+
 actions:
   - name: Say Hi
     label: say-hi

examples/hello_world/linux/packaging/deb/make_config.yaml

@@ -95,6 +95,8 @@ generic_name: Music Application
 # supported_mime_type:
 #   - audio/mpeg
 
+metainfo: linux/packaging/helloworld.appdata.xml
+
 # shown when right clicked the desktop entry icons
 # actions:
 #   - Gallery

examples/hello_world/linux/packaging/helloworld.appdata.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+    <id>hello_world</id>
+    <metadata_license>CC0-1.0</metadata_license>
+    <project_license>MIT</project_license>
+    <name>Hello World</name>
+    <summary>Sample project that is a demo for packaging</summary>
+    <description>
+        <p>The application can be used as a demo for the packaging of flutter application to various platform</p>
+    </description>
+    <launchable type="desktop-id">hello_world.desktop</launchable>
+    <url type="homepage">https://github.com/leanflutter/flutter_distributor/</url>
+    <screenshots>
+        <screenshot type="default">
+            <image>https://github.com/leanflutter/flutter_distributor/assets/41370460/bf942f1d-d26b-441d-b5b2-4ca210b5ea92</image>
+        </screenshot>
+    </screenshots>
+    <releases>
+        <release version="1.0.0" date="2024-06-16"/>
+    </releases>
+    <provides>
+        <id>hello_world.desktop</id>
+    </provides>
+    <content_rating type="oars-1.0" />
+    <developer id="io.github.lijy91">
+        <name>lijy91</name>
+    </developer>
+    <update_contact>[email protected]</update_contact>
+</component>

examples/hello_world/linux/packaging/rpm/make_config.yaml

@@ -17,6 +17,8 @@ keywords:
 
 generic_name: Cool Application
 
+metainfo: linux/packaging/helloworld.appdata.xml
+
 categories:
   - Cool
   - Awesome