add new environment variable to control "quiet" option of msw

src/Umbraco.Web.UI.Client/.env

@@ -2,3 +2,4 @@
 VITE_UMBRACO_USE_MSW=on # on = turns on MSW, off = disables all mock handlers
 VITE_UMBRACO_API_URL=http://localhost:11000
 VITE_UMBRACO_INSTALL_STATUS=running # running or must-install or must-upgrade
+VITE_MSW_QUIET=off # on = turns off MSW console logs, off = turns on MSW console logs

src/Umbraco.Web.UI.Client/src/core/mocks/browser.ts

@@ -16,4 +16,5 @@ export const onUnhandledRequest = (req: MockedRequest) => {
 export const startMockServiceWorker = () =>
 	worker.start({
 		onUnhandledRequest,
+		quiet: import.meta.env.VITE_MSW_QUIET === 'on',
 	});

src/Umbraco.Web.UI.Client/src/vite-env.d.ts

@@ -4,4 +4,5 @@ interface ImportMetaEnv {
 	VITE_UMBRACO_INSTALL_STATUS: 'running' | 'must-upgrade' | 'must-install';
 	VITE_UMBRACO_API_URL: string;
 	VITE_UMBRACO_USE_MSW: 'on' | 'off';
+	VITE_MSW_QUIET: 'on' | 'off';
 }