Add installation guide links after Quick Start sections

Link to product installation guides so users have a clear
next step after the Quick Start. Remove generic "see below"
note from meta-repo since each product now has its own link.

Author: bschwedler

README.md

@@ -34,6 +34,8 @@ The fastest way to get started is to pull and run a pre-built image. See each im
 - [Workbench Session Init](./workbench-session-init/) — Init container for Kubernetes session deployments
 - [Workbench Positron Init](./workbench-positron-init/) — Init container for Positron IDE in Kubernetes
 
+See the [Workbench installation guide](https://docs.posit.co/ide/server-pro/getting_started/installation/) for full setup instructions.
+
 ## Deploying on Kubernetes
 
 Use the [Posit Workbench Helm chart](https://docs.posit.co/helm/charts/rstudio-workbench/README.html) to deploy on Kubernetes.