Rework workflow documentation

The workflow documentation is a bit of a mess. Rework the documentation:

• Split the details out of the platform guide, making it a better high level overview of Apertis targeted more at selling the platform.
• Create an architectural document covering the basics of the Apertis workflow and how the tools used by Apertis fit together. Use pictures to help explain.
• Detailed information about workflows shifted to guides
  • Packaging guide starting to be restructured to better cover workflows by adding sections.
  • Separating out description of component repository layout into its own guide.
  • Shift image creation details to Image building guide.

While I've noticed:

• Packages have been moved from repository based sub-directories under pkg/ to pkg/ its self. Update the URLs used on the website to reflect this.

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

content/architecture/apis-and-services.md

@@ -262,7 +262,7 @@ system to provide the basic UI even if there are no user focused applications:
 
   | Purpose | API Documentation | Git repository |
   |---------|-------------------|----------------|
-  | Logging library | TBD | <https://gitlab.apertis.org/pkg/target/libclapton> |
+  | Logging library | TBD | <https://gitlab.apertis.org/pkg/libclapton> |
 
 
 - **Ribchester**: The service responsible for managing the application and
@@ -270,7 +270,7 @@ system to provide the basic UI even if there are no user focused applications:
 
   | Purpose | API Documentation | Git repository |
   |---------|-------------------|----------------|
-  | Application installer/mounting service | [Ribchester API](https://docs.apertis.org/ribchester/ribchester/) | <https://gitlab.apertis.org/pkg/target/ribchester> |
+  | Application installer/mounting service | [Ribchester API](https://docs.apertis.org/ribchester/ribchester/) | <https://gitlab.apertis.org/pkg/ribchester> |
 
 - **Rhosydd/Croesor**: Rhosydd and Croesor are system services for handling
   access to sensors and actuators from applications. It provides a