feat(java): support add columns via sql expressions

[yanghua]

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[yanghua]

@wjones127 Considering there are many ways to add columns, to reduce the complexity of the rust binding methods, I will define one addColumns and its multiple override methods and multiple native methods for mapping. And one override method one PR, to reduce the cost for code review.

WDYT?

[wjones127]

Considering there are many ways to add columns, to reduce the complexity of the rust binding methods, I will define one addColumns and its multiple override methods and multiple native methods for mapping. And one override method one PR, to reduce the cost for code review.

WDYT?

That seems fine.

[yanghua]

@wjones127 Have addressed your concerns, please take a look.