feat: add timing profiling to the new compiler

[hargoniX]

No description provided.

[Kha]

I would suggest keeping the trace class as Compiler for now, the new output doesn't seem very helpful when enabling specific classes

[Kha]

Speaking from a profiling PoV, we should also have a trace node for the entire compiler invocation

[hargoniX]

I fixed the first part (didn't correct the test traces yet because:) for the second we have:

@[export lean_lcnf_compile_decls]
def main (declNames : List Name) : CoreM Unit := do
  profileitM Exception "compilation new" (← getOptions) do
    CompilerM.run <| discard <| PassManager.run declNames.toArray

right now. What is our policy when the thing already has a profileitM call attach? Do I just trace node it anyways? Do I remove profileit?

[Kha]

Do I just trace node it anyways?

Yes, the two profilers are completely separate currently

[Kha]

Then I'll merge this as an improvement to profiling that should not otherwise significantly affect compiler dev experience