chore(docs): add dynamic plugins examples doc (#1978)

This change adds a document to hold links to examples that have been
developed showing either how to use dynamic plugins or show off features
that are related to or enabled by dynamic plugins.

Signed-off-by: Stan Lewis <[email protected]>

docs/dynamic-plugins/examples.md

@@ -0,0 +1,20 @@
+# Examples
+
+There are several example dynamic plugin projects that have been created to demonstrate various dynamic plugin related features.  Here are some links to externally developed examples for further reference.
+
+> [!WARNING]
+> The following examples are maintained on a best-effort basis, some adjustments may be needed to get an example running, especially against a different target RHDH version.
+
+## For RHDH 1.4 (pre-release)
+
+- [Installing a custom middleware function using a dynamic plugin](https://github.com/gashcrumb/dynamic-plugins-root-http-middleware)
+
+## For RHDH 1.3
+
+- [A dynamic plugin containing a theme](https://github.com/gashcrumb/dynamic-plugins-getting-started-theme)
+
+## For RHDH 1.2
+
+- [A detailed getting started example](https://github.com/gashcrumb/dynamic-plugins-getting-started)
+- [A way to expose a custom mount point from a plugin](https://github.com/gashcrumb/dynamic-plugins-getting-started-custom-mount-point)
+- [A simple example showing how to embed packages](https://github.com/gashcrumb/dynamic-plugins-getting-started-dependency-embedding)

docs/dynamic-plugins/index.md

@@ -28,6 +28,8 @@ More details about publishing dynamic plugins is in the [Packaging Dynamic Plugi
 
 [Wrapping a third-party backend plugin to add dynamic plugin support](wrapping-plugins.md)
 
+[Examples](examples.md)
+
 ## Installing external Backstage plugins into RHDH
 
 1. Get the source code of the plugin.