docs: update references to renamed commons repository (#11)

services/docs/content/en/root/guides/_index.md

@@ -0,0 +1,12 @@
+---
+title: Guides
+description: Step-by-step guides for installation and action development.
+weight: 20
+---
+
+Step-by-step guides for installing and developing within the Root infrastructure framework.
+
+{{% cards %}}
+{{< card link="installation" title="Installation" icon="arrow-down" subtitle="Initial setup of the Root framework on a new host." >}}
+{{< card link="action-development" title="Action development" icon="code" subtitle="Creating and managing atomic automation tasks." >}}
+{{% /cards %}}