Create settings modal, improve modals UX, introduce uiStore and settingsStore (#3895)

- **feat(app2): no wallet connected screen**
- **feat(app2): configurable no wallet connected**
- **refactor(app2): uiStore**
- **feat(app2): connectwalletbutton in multiple places**
- **fix(app2): wallet z positioning**
- **fix(app): make wallet modal exitable**
- **fix(app2): small modal fixes**
- **feat(app): add a modal component**
- **feat(app2): add settingsmodal**
- **feat(app2): configurable page limit in settings**
- **fix(app2): one modal open at a time**
- **fix(app2): add settings icon**