Given an sf polygon and a cell-id raster, return a tibble of
intersecting cell_id with pct_covered (0-100). The cell raster
uses 0-360 longitudes, so the input polygon is transformed and
shifted accordingly.
Arguments
- poly
an sf polygon (assumed or transformable to EPSG:4326)
- r_cell_id
a single-layer
terra::SpatRasterof integer cell ids