feat: add support for derivation expressions - #499
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we also got a Rust crate now with the ANTLR parser that we can start using: https://crates.io/crates/substrait-antlr |
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adds antlr4rust for generating a parser from antlr grammar. this is a rip-off from substrait-io/substrait-validator#501. ports derivation expression evaluation logic from substrait-io/substrait-python#63. this is so far an independent feature meant to be used later on from the registry struct.