[Proposal] Support common csv

[morningman]

Doris currently only supports splitting csv files by delimiters, and does not support advanced features
such as escaping and quotation marks, making it difficult to import certain special characters.

TODO

1. Finding a suitable csv parsing library.
2. Replace current csv parser.
3. Support "skip header" and other format, refer to Clickhouse

[arthuryangcs]

I'm willing to do this, maybe we can discuss more details.