[Frontend] Compile IR from docstring.

[erick-xanadu]

Context:

Adds functionality to compile and execute code specified in a docstring for debugging purposes.

import pennylane as qml

from catalyst.debug.compiler_functions import docstringir


@docstringir
def foo(x: int) -> int:
    """
    module @foo {
      func.func public @jit_foo(%arg0: tensor<i64>) -> tensor<i64> attributes { llvm.emit_c_interface } {
        return %arg0 : tensor<i64>
      }
      module attributes {transform.with_named_sequence} {
        transform.named_sequence @__transform_main(%arg0: !transform.op<"builtin.module">) {
          transform.yield
        }
      }
      func.func @setup() {
        quantum.init
        return
      }
      func.func @teardown() {
        quantum.finalize
        return
      }
    }
    """


print(foo(1))
print(foo.mlir)

Description of the Change:

Benefits:

Possible Drawbacks:

Related GitHub Issues:

While this is functional, I think it would be best to clean up some other interfaces before merging this.