Issue 1622/activist portal events map

[djbusstop]

Description

This PR implements a map for viewing events.

The scope for this work is to just make a map which displays locations with events and can display the events at a location when clicking a location. It should also take up all the space of it's parent so it can be put within a page.

The thinking is that filtering, location search, keyword search, and dates can be done externally and will likely be the same in the event list, as this is just a different representation of an event list. This way the same controls can filter either component.

Screenshots

[Add screenshots here]

Changes

• Adds
  • ZUIMap which can render any location and associated data
  • EventsMap to the Map page in the activist portal

Notes to reviewer

[Add instructions for testing]

Related issues

Resolves #1622

[richardolsson]

This PR contains code written in and around the late 2023 Code Camp that focused on features related to the Activist Portal. After a long hiatus, the day team has recently (PR #2425) returned to the Activist Portal. After so much time, we opted to use this as a prototype but start a new branch, so I'm closing this PR now.

We haven't begun building the map yet, but we've used this work in our discussions about how to do it. Most likely it will become a "filter by place" rather than attempting to list all events on the map, which requires grouping as your prototyping reveals.

Really nice work on this prototype! When someone gets around to implementing the map in the new activist portal, there are definitely things to reuse here!