[Data Prep / Enhancement] Add Hum Data Events to Pipeline

[rothn]

Ingest events from Hum Data and fetch surrounding sat images, etc.

1. Create a notebook to do this and run scripts
2. Integrate this with any real-time ingestion pipeline associated with Copernicus EMS https://github.com/spaceml-org/ml4floods/issues/38 if it exists

[gonzmg88]

Look into #41 and use the same format as used for Copernicus EMS (for each delineated flood save floodmap in geojson and metadata_format in json) We could add later the to the geographic index these!

The notebook with an example scrapped for Copernicus is here:

https://github.com/spaceml-org/ml4floods/blob/893582cb4fe9bec716dbcc966d95ce4850ded610/notebooks/data/HOWTO_download_copernicus_ems_data.ipynb