Convert the existing Preact components into Vue components. Biggest effort here is the slider. The multi-step form and the validation is tackled in another ticket.

Acceptance Criteria:

• Desktop DE banner design is ported to Vue
• The changes for the progress bar are integrated
• The single-step donation form is integrated
• The dynamic text generator is integrated
• The highlighting animation is implemented
• The responsive behaviour of the banner text and the slider is ported to Vue
• The soft close feature is ported to Vue.
• The "I already donated" feature is ported to Vue.
• The one-click-select feature is implemented
• The use of funds content is implemented
• The banner triggers events to the Event Platform
• High-level integration tests are added

Implementation Details:
See https://vueschool.io/articles/vuejs-tutorials/state-management-with-composition-api/ for an introduction on how to use Vue 3 composition API functions to create a minimal "store" (sharing state between components)