[Feature] dictionary encoded binary support

[zhangweilst]

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• I searched in the issues and found nothing similar.

Motivation

Currently paimon-cpp does not handle dictionary for binary type. It's OK for the default parquet reader because it would not return a dictionary for the binary type.
But for customed parquet readers or if there're ARROW:schema meta data in the parquet footer, it's possible to return dictionary for a binary type. In that case, there'll be data error since ColumnarUtils::GetView returns empty.

Solution

No response

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!