[SAoC] MLIR Support for LDC

[Roberto Rosmaninho]

Hi everyone,
Just a kick updates about the project:

1. Compilation of D through the LLVM dialect of MLIR:
  - Model all core IR structures in LLVM: Instructions, Globals, 
Modules, etc.
  -- Status: Module and Function already implemented, working now 
on operations.

  - Traverse the AST of D to emit MLIR code.
  -- Status: Working on simple examples with integers and 
BinOps(+,-,x,/) so far, I'll work this last week to cover more 
types and operations.

CMake Status: I'm trying to compile the project on other machines 
to make sure that each modification doesn't crash the compiler.

Best regards,
Roberto Rosmaninho