V16: Vite development optimizations (#18915)

* feat: resolve TODO by removing quiet option

* feat: exclude ./src/mocks from production build

* feat: load only msw when running through vite

* feat: optimise load order

* feat: handles mocked logos with virtual path

* feat: loads mocked service worker from virtual path

* feat: loads assets from virtual path

* feat: forces MSW=on for the static build

* build: adds storybook workflow copied over from the old backoffice repository

* build: limits where the build runs

* build: adds workflow to build a static version of the backoffice upon request

* build: excludes the `/umbraco/backoffice/assets` folder from navigation fallback just in case

* build: triggers run when the workflow file itself changes

* build: triggers run when package.json changes

* build: marks the 'contrib' branch as production

* build: activates static builds on preview/* labels

* build: bumps github checkout version

* build: updates key for backoffice web app

* build: updates key for storybook

* build: disables build for release branches to preseve on preview environments

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

@@ -2,5 +2,4 @@
 VITE_UMBRACO_USE_MSW=on # on = turns on MSW, off = disables all mock handlers
 VITE_UMBRACO_API_URL=https://localhost:44339
 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
 VITE_UMBRACO_EXTENSION_MOCKS=off # on = turns on extension mocks, off = turns off extension mocks