Add complete CLI and SDK reference docs (#1728)

Adds docs/early/aca-cli/complete-reference.md and docs/early/python-sdk/complete-reference.md with full reference documentation. Existing READMEs now link to their respective complete reference.

Co-authored-by: Annaji Sharma Ganti <Annaji.Ganti+microsoft@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

docs/early/aca-cli/README.md

@@ -1,5 +1,7 @@
 # Azure Container Apps Sandboxes CLI (Early Access)
 
+> Looking for a full reference of every command, flag, env var, and config knob? See the [**complete CLI reference**](./complete-reference.md).
+
 ## Prerequisites
 
 - [Azure CLI](https://learn.microsoft.com/cli/azure/install-azure-cli) installed and logged in (`az login`)