Add SortBuilder for SortOptions

[Banyc]

Which issue does this PR close?

• Prepare for feat: Add SortOptions builder for better Expr::sort API datafusion#20229; later in datafusion we can reexport this SortBuilder and SortOptions for a to-be-implemented alternative of sort() dataframe statement.

Rationale for this change

want to solve the obscure API problem described in apache/datafusion#20227

What changes are included in this PR?

the change added a new builder for the existing SortOptions

Are these changes tested?

yes and everything passes

Are there any user-facing changes?

yes.

there are new struct SortBuilder and its pub methods introduced

[Banyc]

Risk

should we add a builder pattern if we already have the

SortOptions { a: true, b: false }

construtor pattern?

[brunal]

How about a typestate pattern? I think that would:

• prevent the need for a () struct item
• Introduce a single struct instead of several
• Allow specifying the 2 parameters in any order

[alamb]

Thanks @Banyc

This PR needs:

1. Test coverage (maybe doc example)
2. Some explanation why this doesn't follow standard rust builder patterns (e.g. why do we need an intermediate state for an object with 2 fields)

Also, given that the SortOptions struct itself already has builder like methods, such as https://docs.rs/arrow/latest/arrow/compute/struct.SortOptions.html#method.asc can you please explain the value a separate builder adds?

[alamb]

What is the purpose of this field? I am not familiar witht his pattern

[alamb]

Thank you for the review @brunal