Populate overview page

Signed-off-by: Pau Capdevila <[email protected]>

Author: pau-hedgehog

docs/user-guide/overview.md

@@ -1,3 +1,11 @@
 # Overview
 
-This chapter gives an overview of the main features of Hedgehog Fabric and their usage.
+This chapter gives an overview of the main features of Hedgehog Fabric and their usage:
+
+- [**Switches and Servers**](devices.md): Covers the foundational elements of the fabric, including switches and servers, and their configurations.
+- [**Connections**](connections.md): Describes the different types of network links, such as workload server connections, switch interconnects, and external peering links.
+- [**VPCs and Namespaces**](vpcs.md): Explains virtual private cloud configurations, subnet management, and peering mechanisms.
+- [**External Peering**](external.md): Details how to connect the fabric to external networks and services through border leaf peering.
+- [**Fabric Shrink/Expand**](shrink-expand.md): Guides users on adding, removing, or replacing switches within the fabric.
+- [**Switch Profiles and Port Naming**](profiles.md): Defines switch profiles, port naming conventions, and supported configurations.
+- [**Grafana Dashboards**](grafana.md): Provides insights into monitoring and visualization tools for tracking fabric performance and health.