feat: impl IdlingRenderScheduler (#10547)

* feat: impl IdleRender

* test: pin time on Chromatic

* test: pin time on Chromatic

* fix: typo

* style: rename

* style: rename

* chore: back to setTimeout

* style: linebreak

* refactor: remove unused budget option

* refactor: use raw unix time

* fix: conflict error

* fix: floor

* fix: subtract

* Revert "fix: subtract"

This reverts commit 2ef4afaafc.

* Revert "fix: floor"

This reverts commit bef8ecdf45.

* Revert "refactor: use raw unix time"

This reverts commit 5199e13cb2.

packages/frontend/.storybook/generate.tsx

@@ -397,6 +397,7 @@ function toStories(component: string): string {
 Promise.all([
 	glob('src/components/global/*.vue'),
 	glob('src/components/Mk{A,B}*.vue'),
+	glob('src/components/MkDigitalClock.vue'),
 	glob('src/components/MkGalleryPostPreview.vue'),
 	glob('src/components/MkSignupServerRules.vue'),
 	glob('src/components/MkUserSetupDialog.vue'),