feat: implement csv writer

[pnadolny13]

The csv format type logic still needs to be written. I think the current base format and smart open handle most of this for us already but we need to figure out the best way to pass in the csv config options for common use cases e.g. delimter, quotechar, encoding, etc.

[crowemi]

I was thinking the properties should be refactored to handle specific files formats configurations. (#8)