feat: add tryItOutEnabled configuration (#6865)

* feat: add tryItOutEnabled configuration

allow users to set tryItOutEnabled: true to display
the "Try it out" section by default

tryItOutEnabled to take === "true" for the
query string value or === true if someone
implements query string type parsing in the query

test/e2e-cypress/static/documents/features/try-it-out-enabled.yaml

@@ -0,0 +1,13 @@
+openapi: 3.0.2
+info:
+  title: try it out enabled test
+  version: 0.0.1
+  description: |-
+    a simple test to ensure tryItOutEnabled=true expands "Try it out"
+paths:
+  /:
+    get:
+      summary: an operation
+      responses:
+        "200":
+          description: OK