[Question][jdbc splitpk] splitpk supports time type?

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- [X] I had googled my question but i didn't get any help.

- [X] I had read the documentation: [ChunJun doc](https://dtstack.github.io/chunjun) but it didn't help me.

### Description

I want to use a field of type time as splitpk, which requires the user to enter a field of type time, and then chunjun starts to calculate the start and end values of the time, and also supports the user to input the start and end values by himself, and then calculates the step size to get Each parallelism sql, but after reading the relevant code, I found that it is not easy to expand, can you explain how to modify it?

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