feat(docs): Migrate to mdbook

docs/common-library/introduction.md

@@ -1,36 +0,0 @@
-# Common library
-
-!!! note
-    The Common library chart is not meant to be installed directly, application
-    charts use the Common library as a dependency.
-    See the [app template](../../app-template/introduction) for an example how to
-    deploy it.
-
-## Background
-
-In Helm 3, their team introduced the concept of a
-[Library chart](https://helm.sh/docs/topics/library_charts/).
-
-> A library chart is a type of Helm chart that defines chart primitives or
-  definitions which can be shared by Helm templates in other charts. This
-  allows users to share snippets of code that can be re-used across charts,
-  avoiding repetition and keeping charts DRY.
-
-The common library was created because I saw many charts requiring only a
-few select configuration options in their Helm charts.
-
-!!! note
-    Take one of the many applications like `sonarr` or `nzbget`. Each of these
-    charts only require setting `service`, `port`, `persistence`, `ingress`
-    and `image` since state and app configuration is handled by the application
-    itself.
-
-In order to stay somewhat DRY (Don't Repeat Yourself) and keeping with Helm 3
-usage for a Library chart, I saw this pattern and decided it was worth it to
-create a library. This means each one of these app charts has a
-dependency on what we call the `common` library.
-
-## Source code
-
-The source code for the common library chart can be found
-[here](https://github.com/bjw-s/helm-charts/tree/main/charts/library/common).