terraform output: add page (#13254)

Co-authored-by: spageektti <git@spageektti.cc>

pages/common/terraform-output.md

@@ -0,0 +1,20 @@
+# terraform output
+
+> Export structured data about your Terraform resources.
+> More information: <https://developer.hashicorp.com/terraform/cli/commands/output>.
+
+- With no additional arguments, `output` will display all outputs for the root module:
+
+`terraform output`
+
+- Output only a value with specific name:
+
+`terraform output {{name}}`
+
+- Convert the output value to a raw string (useful for shell scripts):
+
+`terraform output -raw`
+
+- Format the outputs as a JSON object, with a key per output (useful with jq):
+
+`terraform output -json`