Add additional warnings about deprecated application framework

Include a warning about the old application framework being deprecated
in favor of next-gen Apertis application framework in documents that
have reference to it, in the same way it is done in other places.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

content/architecture/apis-and-services.md

@@ -102,6 +102,13 @@ multiple Applications. The APIs are classified into Enabling APIs and SDK APIs.
   APIs to provide higher-level functionality. Platform upgrades may require
   adapting applications to new APIs and/or ABIs for these.
 
+{{% notice warning %}}
+The custom application framework based on the Canterbury app manager has been
+removed from `v2022dev2` in favor of upstream components like Flatpak, see the
+[application framework]( {{< ref "application-framework.md" >}} ) document for
+more details.
+{{% /notice %}}
+
 {{% notice info %}}
 Please see the
 [contribution process](contribution_process/#adding-components-to-apertis) for

content/guides/ade.md

@@ -53,6 +53,13 @@ case.
 * [helloworld-webapp](https://gitlab.apertis.org/sample-applications/helloworld-webapp):
   A basic Web Runtime application
 
+{{% notice warning %}}
+The custom application framework based on the Canterbury app manager has been
+removed from `v2022dev2` in favor of upstream components like Flatpak, see the
+[application framework]( {{< ref "application-framework.md" >}} ) document for
+more details.
+{{% /notice %}}
+
 {{% notice info %}}
 The sample applications are also available from the
 [Apertis gitlab](https://gitlab.apertis.org/sample-applications).