Add C++ API for Columnar Encryption

[dongjoon-hyun]

This is created based on the following dev@orc mail on June 11st.

https://lists.apache.org/thread/pkp6ffh9pqok7v618zxtox708mv26sz0

[dongjoon-hyun]

cc @wgtmac , @williamhyun , @guiyanakuang , @stiga-huang

[guiyanakuang]

I looked at the commit history of the Java api. It seems like a lot of work. Maybe we should follow the steps of the Java implementation and divide it into smaller topics.

[dongjoon-hyun]

I agree with you, @guiyanakuang . It will take lots of efforts.

[wgtmac]

+1 @guiyanakuang @dongjoon-hyun.

This is a large feature. We can follow the java implementation and break it down into smaller work items first.

[dongjoon-hyun]

Thank you, @wgtmac .

[dongjoon-hyun]

I set a milestone 1.9.0 as a goal.

[deshanxiao]

Hi @dongjoon-hyun Do we have jira to track the work?

[wgtmac]

Hi @dongjoon-hyun Do we have jira to track the work?

@deshanxiao Not yet. @coderex2522 is working on it already. Will create JIRAs later.

[zxf216]

Hi @dongjoon-hyun Do we have jira to track the work?

@deshanxiao Not yet. @coderex2522 is working on it already. Will create JIRAs later.

@coderex2522 Has the ORC file encryption and decryption functionality been implemented?