Idiomatic specification of options in read_csv_duckdb() and read_parquet_duckdb()

[krlmlr]

Currently, there's a simple options argument that is passed through to DuckDB. Can we have the most common options available as first-class arguments to the respective functions? In an ideal world, we could reuse the readr specification for column types too.

# Current:
read_csv_duckdb(..., options = list(delim = ...))

# Better:
read_csv_duckdb(..., delim = ...)