support clang-format and clang-tidy

[chaoyli]

Doris is short for static code format and check, it's better to add clang-format and clang-tidy.
I will add some clang-format and clang-tidy in the following patch

[sduzh]

Doris考虑先一次性把整个仓库format一下吗?
@kangkaisen @chaoyli @imay @morningman

[morningman]

Doris考虑先一次性把整个仓库format一下吗?
@kangkaisen @chaoyli @imay @morningman

I think we can do it step by step.
Format the entire code base in one time it not easy for review and code rebase.

[sduzh]

Doris考虑先一次性把整个仓库format一下吗?
@kangkaisen @chaoyli @imay @morningman

I think we can do it step by step.
Format the entire code base in one time it not easy for review and code rebase.

IMHO, formatting the whole codebase at once would be more friendly for other contributors, since they can just focus on their newly added code.

[yangzhg]

fe unittest may also be formate and tidy at this time