Add dummy task files for internal modules

Author: Donien

changelogs/fragments/feature_add_monitoring.yml

@@ -1,3 +1,4 @@
 ---
 bugfixes:
-  - Add package name :code:`icingaweb2` for Icinga Web's internal modules (e.g. :code:`monitoring`), so they can be installed and configured properly.
+  - Add internal modules to installable modules list. This allows for modules directly shipped with Icinga Web 2 to be configurable.
+    This mostly affects the :code:`monitoring` module since it has actual configuration options. Others like :code:`setup` can now be enabled/disabled.

roles/icingaweb2/tasks/modules/doc.yml

@@ -0,0 +1 @@
+# Placeholder to keep logic consistent. No configuration is needed.

roles/icingaweb2/tasks/modules/migrate.yml

@@ -0,0 +1 @@
+# Placeholder to keep logic consistent. No configuration is needed.

roles/icingaweb2/tasks/modules/setup.yml

@@ -0,0 +1 @@
+# Placeholder to keep logic consistent. No configuration is needed.

roles/icingaweb2/tasks/modules/translation.yml

@@ -0,0 +1 @@
+# Placeholder to keep logic consistent. No configuration is needed.