Add banner for tcmap hiatus

Reminder to users that info may be out of date this week.

[x] Tapping on a marker on the map displays information about the marker in a popup.
[x] Tapping the "Show list of locations" button replaces the map view with a list view.
[x] Tapping an item in the list replaces the list view with a map view, and navigates the map to the tapped item on the map.
[x] Tapping one of the ✅'s in the legend filters items on the map and in the list.
[x] Changing the language to spanish changes things on the page.
[x] Clicking the Help/Info button opens and closes a menu with information.
[x] Clicking the X Close button on the Help/Info screen closes the modal.

Twin-Cities-Mutual-Aid / twin-cities-aid-distribution-locations