Add demo test variant

We're piggybacking on our existing integration test framework to record  demos that we can include in our docs

pkg/integration/clients/go_test.go

@@ -40,6 +40,12 @@ func TestIntegration(t *testing.T) {
 				return
 			}
 
+			// not running demoes right now. Arguably we should, but we'd need to
+			// strip away any artificial lag they use.
+			if test.IsDemo() {
+				return
+			}
+
 			t.Run(test.Name(), func(t *testing.T) {
 				t.Parallel()
 				err := f()

pkg/integration/clients/tui.go

@@ -19,7 +19,7 @@ import (
 
 // This program lets you run integration tests from a TUI. See pkg/integration/README.md for more info.
 
-var SLOW_KEY_PRESS_DELAY = 300
+var SLOW_KEY_PRESS_DELAY = 600
 
 func RunTUI() {
 	rootDir := utils.GetLazyRootDirectory()