Add HSMA map

[Bergam0t]

We have a google map of people from across the HSMA 6 cohort.

I think for privacy reasons we'll need to extract that data and add some jitter.

Can then include as a Leaflet map via the Folium package showing rough locations of cohort.

Could also tie up organisations to lat/long but could be time consuming (given many organisations have changed/merged).
Benefit for people finding relevant local projects (or people in their orgs who did HSMA? Though lots likely to have moved on)

Further possible extensions

• embedded Streamlit app with 2-way filtering on zoom