JSON schema documentation tool (#3070)

* wip

* wip

* wip

* generate schema docs

* formatting

* typo

* fix details

* fix details

* revert dp change

* tfdoc

fast/addons/2-networking-test/schemas/instance.schema.md

@@ -0,0 +1,26 @@
+# Instance
+
+<!-- markdownlint-disable MD036 -->
+
+## Properties
+
+*additional properties: false*
+
+- ⁺**project_id**: *string*
+- ⁺**network_id**: *string*
+- ⁺**service_account**: *string*
+- ⁺**subnet_id**: *string*
+- **image**: *string*
+- **metadata**: *object*
+  *additional properties: String*
+- **name**: *string*
+- **tags**: *array*
+  - items: *string*
+- **type**: *string*
+  <br>*default: e2-micro*
+- **user_data_file**: *string*
+- **zones**: *array*
+  - items: *string*
+
+## Definitions
+