Update documentation

Author: simu

docs/modules/ROOT/pages/reference/cli.adoc

@@ -654,3 +654,7 @@ However, labels added by previous runs can't be removed since we've got no easy
 *--template-version* TEXT::
   The component template version (Git tree-ish) to use.
   If not provided, the currently active template version will be used.
+
+== Version
+
+Show extended version information for Commodore.

docs/modules/ROOT/pages/reference/commands.adoc

@@ -277,3 +277,11 @@ The command bases each PR on the default branch of the corresponding package rep
 
 The command requires a GitHub Access token with the 'public_repo' permission, which is required to create PRs on public repositories.
 If you want to manage private repos, the access token may require additional permissions.
+
+== Version
+
+  commodore version
+
+Show extended version information for Commodore.
+The command displays the installed version for the `kapitan`, `gojsonnet` and `reclass-rs` Python packages.
+Additionally, the command displays the path and version of the required external commands `helm`, `jb` and `kustomize`.