ASA: Query map data on click

**Describe the task**
Allow a user to interact with the ASA map in order to query any point location on the map. Start off by just getting the HFI value on click

**Acceptance Criteria**
- [ ] Pop up that displays HFI value at location
- [ ] second
- [ ] third

**Additional context**
- Map clicks currently only interact with Zone Unit polygons, might need a separate map click tool in OpenLayers
- PMtile layers currently don't store raw HFI values, they store the classified values of 1 or 2
- If we want to query more than just HFI down the road, this should maybe work as an endpoint that accepts user interaction coordinates/proj information

Start by locating the existing ASA map click handling and the OpenLayers map interaction. Check how PMTile layers expose classified HFI values and whether raw values are available for a clicked coordinate. Done means a map click displays the HFI value at that location; the remaining acceptance items need clarification.

Written by the indexing model from the issue text.