Remove redundant packages concept document

The packages concept came from the old wiki. It more or less duplicates the content listed in the "Platform APIs and Services" architectural document, but also lists a number of packages that have long since been removed from Apertis. Perform a quick tidy up, moving any potentially useful/relevant information to the architectural document and deleting the packages page.

Signed-off-by: Martyn Welch martyn.welch@collabora.com

content/architecture/apis-and-services.md

@@ -106,7 +106,12 @@ Please see the
 [contribution process](contribution_process/#adding-components-to-apertis) for
 guidance if your application depends on a component that is not including in
 Apertis.
-{{% /notice %}}                                                                          
+{{% /notice %}}
+
+{{% notice note %}}
+Many of the Apertis specific packages are named after sites in the UK where
+significant Roman archaeological hoards were found.
+{{% /notice %}}
 
 # Core Applications
 
@@ -123,10 +128,32 @@ system to provide the basic UI even if there are no user focused applications:
 
 ## SDK services
 
-- **mildenhall-launcher**: App launcher. Every app installed in the system will
-  be listed here.
-- **mildenhall-settings**: Collection of system and app settings (if any)
-- **mildenhall-statusbar**: Status information shown at the top oft he screen
+- **mildenhall-launcher**: Every app installed in the system will be listed by
+  this graphical application and be available to be launched.
+
+  | Purpose | Git repository |
+  |---------|----------------|
+  | Application Launcher | <https://gitlab.apertis.org/pkg/mildenhall-launcher> |
+
+- **mildenhall-popup-layer**: Graphical application for displaying popup
+  notifications.
+
+  | Purpose | Git repository |
+  |---------|----------------|
+  | Popup Notifications | <https://gitlab.apertis.org/pkg/mildenhall-popup-layer> |
+
+- **mildenhall-settings**: Provides access to system and app settings.
+
+  | Purpose | Git repository |
+  |---------|----------------|
+  | System settings | <https://gitlab.apertis.org/pkg/mildenhall-settings> |
+
+- **mildenhall-statusbar**: Status information shown at the top of the screen
+
+  | Purpose | Git repository |
+  |---------|----------------|
+  | Status Bar | <https://gitlab.apertis.org/pkg/mildenhall-statusbar> |
+
 
 ## Enabling Components
 - [PolicyKit](https://www.freedesktop.org/software/polkit/docs/latest/polkit.8.html):
@@ -137,8 +164,13 @@ system to provide the basic UI even if there are no user focused applications:
 
 - [eglibc](http://www.gnu.org/software/libc/manual/html_node/index.html): Basic OS interfaces
 - [GLib](https://developer.gnome.org/glib/stable/): Basic programming framework
-- [systemd](https://www.freedesktop.org/wiki/Software/systemd/): Service manager
 - [OSTree](http://ostree.readthedocs.io/): Atomic software updates
+- [systemd](https://www.freedesktop.org/wiki/Software/systemd/): Service
+  management service, used as both a system service and a user service. The
+  system instance is process 1 (the first process launched by the kernel after
+  leaving the early-boot environment), and is responsible for starting and
+  monitoring all system services and all user sessions. The per-user instance,
+  `systemd --user`, manages user services.
 
 ## Full package index
 
@@ -301,6 +333,16 @@ Full package list in TSV format, categorized under different repository componen
 
 - [SQLite](https://sqlite.org/docs.html): Data storage
 - [GMime](https://developer.gnome.org/gmime/stable/): File format support
+- [D-Bus](https://www.freedesktop.org/wiki/Software/dbus/): `dbus-daemon` is a
+  platform component, used as both a user service and a system service. The
+  system bus, `dbus-daemon --system`, connects applications and platform
+  components to system services, and mediates their access to those system
+  services. All components that are able to connect to the system bus may
+  listen for signals (normally broadcasts) from authorized system services. All
+  other accesses, including sending signals, are prevented unless they are
+  specifically allowed by configuration. The per-user session bus, `dbus-daemon
+  --session`, is a user service which connects user applications and user
+  services together and mediates their communication.
 
 # Connectivity