az-config: add page (#6701)

pages/common/az-config.md

@@ -0,0 +1,21 @@
+# az config
+
+> Manage Azure CLI configuration.
+> Part of `azure-cli`.
+> More information: <https://docs.microsoft.com/cli/azure/config>.
+
+- Print all configurations:
+
+`az config get`
+
+- Print configurations for a specific section:
+
+`az config get {{section_name}}`
+
+- Set a configuration:
+
+`az config set {{configuration_name}}={{value}}`
+
+- Unset a configuration:
+
+`az config unset {{configuration_name}}`