refactor: change opening hours handling

fix: opening hours not updating
feat: lazy-load opening hours module
feat: add e2e tests for opening hours
refactor: migrate opening hours to on-push change detection
feat: show exact minutes in opening hours starting one hour before next change

frontend/app/angular.json

@@ -182,6 +182,7 @@
           "builder": "@cypress/schematic:cypress",
           "options": {
             "devServerTarget": "app:serve",
+            "liveReload": false,
             "watch": true,
             "headless": false
           },