Remove encoding, combine it with VTable struct

Signed-off-by: Nicholas Gates <[email protected]>

Author: gatesn

vortex-array/src/vtable/dyn_.rs

@@ -8,7 +8,7 @@ use std::sync::Arc;
 use arcref::ArcRef;
 use vortex_buffer::ByteBuffer;
 use vortex_dtype::DType;
-use vortex_error::{vortex_bail, vortex_err, VortexExpect, VortexResult};
+use vortex_error::{VortexExpect, VortexResult, vortex_bail, vortex_err};
 
 use crate::serde::ArrayChildren;
 use crate::vtable::{EncodeVTable, VTable};