Add `ExpressionVisitor` to evaluate expressions

[Fokko]

Once #58 is in, we can add an ExpressionVisitor to evaluate expressions: https://github.com/apache/iceberg/blob/main/api/src/main/java/org/apache/iceberg/expressions/ExpressionVisitors.java

[Kelvinyu1117]

I'm interested in working on this issue. Does anyone work on it currently?

[wgtmac]

Thanks for your interest! Before implementing this feature, I think we miss other fundamental stuff like reference, predicate, etc. AFAIK, @mapleFU and @yingcai-cy are working on those expression types.

[mapleFU]

I'm trying to draft interfaces but currently I'm a bit busy, I'll try to create interfaces this weekend. The basic idea refer to #126

After the interface for BoundPredicate and (unbound) Predicate is basically implemented, we can start the evaluator part

[yingcai-cy]

I'm trying to draft interfaces but currently I'm a bit busy, I'll try to create interfaces this weekend. The basic idea refer to #126

After the interface for BoundPredicate and (unbound) Predicate is basically implemented, we can start the evaluator part

Sounds good — let’s start with the interfaces. Given there are many in the Java/Python versions, it’s worth rethinking the design from a C++ perspective.