Missing features in Copy From/To

[acquamarin]

Copy-to csv

• [x] Support copy fixed-list to csv.
• [x] Support copy union to csv.
• [x] Support copy to with options. (https://github.com/kuzudb/kuzu/issues/2439)

Copy-to parquet

• [x] Support copy to with options. (https://github.com/kuzudb/kuzu/issues/2638)
• [x] Support fixed-list, MAP, timezone, interval datatype.

Copy-from parquet

• [x] Support fixed-list, MAP, timezone, interval,timestamp datatype.
• [x] Support implicit casting while reading from parquet column with a different column type. (https://github.com/kuzudb/kuzu/issues/2345)
• [x] Support more encoding/compression scheme

Utility table functions

• [ ] parquet_metadata: used to query the metadata contained within a Parquet file, which reveals various internal details of the Parquet file such as the statistics of the different columns.
• [ ] parquet_schema: used to query the internal schema contained within a Parquet file.
• [ ] parquet_file_metadata: used to query file-level metadata such as the format version and the encryption algorithm used.
• [ ] parquet_kv_metadata: used to query custom metadata defined as key-value pairs.