chore(webpack): Move to shared code for entrypoints and use webpack serve public path

Signed-off-by: Julius Härtl <jus@bitgrid.net>

src/init-calendar.js

@@ -23,6 +23,8 @@
 import { subscribe } from '@nextcloud/event-bus'
 import { generateUrl } from '@nextcloud/router'
 
+import './shared-init.js'
+
 subscribe('calendar:handle-todo-click', ({ calendarId, taskId }) => {
 	const deckAppPrefix = 'app-generated--deck--board-'
 	if (calendarId.startsWith(deckAppPrefix)) {