Move events between timelines (#21557)

frontend/src/metabase-types/api/timeline.ts

frontend/src/metabase/entities/timeline-events.js

frontend/src/metabase/entities/timelines.js

frontend/src/metabase/lib/timelines.ts

frontend/src/metabase/lib/urls.js

...end/src/metabase/query_builder/components/QueryModals.jsx

...ponents/view/sidebars/TimelineSidebar/TimelineSidebar.tsx

frontend/src/metabase/query_builder/constants.js

frontend/src/metabase/query_builder/selectors.js

...onents/DeleteTimelineModal/DeleteTimelineModal.styled.tsx

...tions/components/EditEventModal/EditEventModal.styled.tsx

...components/EditTimelineModal/EditTimelineModal.styled.tsx

.../timelines/collections/components/EventCard/EventCard.tsx

.../collections/components/EventCard/EventCard.unit.spec.tsx

.../timelines/collections/components/EventList/EventList.tsx

.../collections/components/EventList/EventList.unit.spec.tsx

...ections/components/NewEventModal/NewEventModal.styled.tsx

...es/collections/components/NewEventModal/NewEventModal.tsx

...ions/components/NewEventModal/NewEventModal.unit.spec.tsx

...s/components/NewTimelineModal/NewTimelineModal.styled.tsx