chore: add description to apps

lib-ee/emqx_ee_bridge/src/emqx_ee_bridge.app.src

@@ -1,4 +1,5 @@
 {application, emqx_ee_bridge, [
+    {description, "EMQX Enterprise data bridges"},
     {vsn, "0.1.0"},
     {registered, []},
     {applications, [

lib-ee/emqx_ee_connector/src/emqx_ee_connector.app.src

@@ -1,4 +1,5 @@
 {application, emqx_ee_connector, [
+    {description, "EMQX Enterprise connectors"},
     {vsn, "0.1.0"},
     {registered, []},
     {applications, [