feat(11.1-03): add the Setup and Console docs sections

- setup: introduction, installation rewritten from install to serve,
  configuration with the keys an application sets
- console: introduction, setup and maintenance, scaffolding, writing
  commands, utilities; every command name is checker-verified
- bonfire ExampleCatalog shows arguments, bare and repeatable flags
- index links the section introductions; TestDocsRequiredPages lists
  the seven new pages

cmd/summer/docs_test.go

@@ -86,6 +86,13 @@ var requiredPages = []string{
 	"plugins/scheduling",
 	"plugins/extending",
 	"plugins/testing",
+	"setup/introduction",
+	"setup/configuration",
+	"console/introduction",
+	"console/setup-and-maintenance",
+	"console/scaffolding",
+	"console/writing-commands",
+	"console/utilities",
 }
 
 // TestDocsRequiredPages asserts that every required page is in the loaded