Research tablegen and sierra dialect feasibility

[igaray]

Having a Sierra dialect, and porting our code from the current form to a conversion between the sierra and llvm dialect would enable more analisis and conversions between other dialects.
The use of the llvm tablegen dialect is required and may be complicated by the bindings.
Research MLIR's guide on how to create a dialect and the equivalent via the Rust bindings to understand the complexity of this task.