chore(flutter): add snapcraft.yaml example in platform setup (#4599)

* chore: add snapcraft.yaml example

* chore: update snapcraft example

* Update src/fragments/lib/project-setup/flutter/platform-setup/platform-setup.mdx

Co-authored-by: Dillon Nys <24740863+dnys1@users.noreply.github.com>

* chore: remove  in Amplify-Flutter

* chore: include lin kto flutter docs

* chore: add links, update libglib2

Co-authored-by: Dillon Nys <24740863+dnys1@users.noreply.github.com>

cspell.json

@@ -1490,7 +1490,8 @@
     "infowindow",
     "Libre's",
     "Pinia",
-    "kotlinx"
+    "kotlinx",
+    "snapcraft"
   ],
   "flagWords": [
     "hte", 

src/fragments/lib/project-setup/flutter/platform-setup/platform-setup.mdx

@@ -110,22 +110,35 @@ Add a development team in the "Signing and Capabilities" section and enable sign
 No specific configuration steps are needed to begin using the Auth category on Windows; however, depending on how your Windows configuration and the method you use to run your Flutter app, you may need to change the file path length limitation.
 
 ## Linux
-To run the Amplify-Flutter developer preview on Linux, you must install two libraries:
-
-* libsecret-1-dev
-* libglib2.0-dev
+Amplify Flutter depends on [libsecret](https://wiki.gnome.org/Projects/Libsecret) when targeting Linux. To run and debug an app that depends on Amplify Flutter, you must install `libsecret-1-dev`.
 
 To install on Ubuntu, run:
 
 /* cSpell:disable */
 ```terminal
 sudo apt-get update
 sudo apt-get install -y libsecret-1-dev
-sudo apt-get install -y libglib2.0-dev
 ```
 /* cSpell:enable */
 
-The command to install might vary slightly on other Linux distributions.
+This will also install dependencies of `libsecret-1-dev`, such as `libglib2.0-dev`, which is also required for to run and debug apps that depend on Amplify Flutter.
+
+> The command to install might vary on other Linux distributions.
+
+### Packaging Your App
+To include the required dependencies when packaging your app with Snapcraft, include them in your `snapcraft.yaml` file. For more info, see [Flutter's documentation on releasing to the Snap Store](https://docs.flutter.dev/deployment/linux).
+
+```yaml
+parts:
+  my-app:
+    plugin: flutter
+    source: .
+    flutter-target: lib/main.dart
+    build-packages:
+      - libsecret-1-dev
+    stage-packages:
+      - libsecret-1-0
+```
 
 </Block>