feat(06-03): add raw groups, house middleware, and route:list

- GroupRaw plus sticky raw inheritance and registration-time house-envelope refusal via pact.HasHouseMiddleware
- Recover on raw routes writes a bare 500; non-raw keeps the house JSON body
- Router.Routes() and surf.RouteListCommand; generated main registers route:list

internal/build/build.go

@@ -111,6 +111,7 @@ func generateMain(m Manifest) ([]byte, error) {
 	b.WriteString("\t}\n")
 	b.WriteString("\tcommands := lagoon.RuntimeCommands(app, plugins)\n")
 	b.WriteString("\tcommands = append(commands, surf.ServeCommand(app, plugins))\n")
+	b.WriteString("\tcommands = append(commands, surf.RouteListCommand(app, plugins))\n")
 	b.WriteString("\tfor _, plugin := range plugins {\n")
 	b.WriteString("\t\tif hasCommands, ok := plugin.(pact.HasCommands); ok {\n")
 	b.WriteString("\t\t\tcommands = append(commands, hasCommands.Commands()...)\n")