Document COPY parquet specific options

[alamb]

Is your feature request related to a problem or challenge?

#7466 from @devinjdangelo added support for specifying parquet specific options via the COPY SQL command. For exampe the following defaults compression to snappy but overrides compression for the col1 and col2

copy my_table
to my_file.parquet
(compression snappy
'compression::col1' 'zstd(5)',
'compression::col2.nested' 'zstd(10)'

Describe the solution you'd like

Update the COPY documentation in https://arrow.apache.org/datafusion/user-guide/sql/dml.html#copy to include this syntax and details

See also https://github.com/apache/arrow-datafusion/blob/main/datafusion/sqllogictest/test_files/copy.slt for a bunch of examples

Describe alternatives you've considered

No response

Additional context

No response