Merge multiple downloaded raster files into a single file. The input `target_prj` describes the projection for the new grid.
merge_rasters(
raster_list,
target_prj,
method = "bilinear",
returnRaster = TRUE
)
a list of raster file paths to be mosaiced
the target projection of the output raster
the method for resampling/reprojecting. Default is 'bilinear'. Options can be found [here](https://gdal.org/programs/gdalwarp.html#cmdoption-gdalwarp-r)
if TRUE, return a raster object (default), else, return the file path to the object