add the qcor-qrt demo

#include "qcor.hpp"

#include "xacc_service.hpp"

// qcor qrt_demo.cpp

// ./a.out 

// qcor qrt_demo.cpp -qpu aer:ibmq_jakarta

// ./a.out

using namespace quantum;

int main() {

  // Hard code the shots for NISQ to 100

  qcor::set_shots(100);

  { // NISQ Mode Execution

    // Allocate some qubits

    auto q = qalloc(2);

    // Get local reference to global qrt_impl pointer

    QuantumRuntime& local_qrt = *qrt_impl.get();

    // Call the quantum gate instructions on the runtime

    // for NISQ mode, this will build up a CompositeInstruction

    local_qrt.h(q[0]);

    local_qrt.cnot(q[0], q[1]);

    for (auto qi : q) local_qrt.mz(qi);

    // Submit the CompositeInstruction (just like with xacc)

    local_qrt.submit(q.results());

    // Print the results

    for (auto [bit, count] : q.counts()) {

      print(bit, ":", count);

    }

  }

  // Now switch to the FTQC runtime mode

  // must initialize with a name for the CompositeInstruction

  qrt_impl = xacc::getService<QuantumRuntime>("ftqc");

  qrt_impl->initialize("ftqc_test");

  { // FTQC Mode Execution

    // Allocate the qubits

    auto q = qalloc(2);

    // Get local reference to the global qrt_impl pointer

    // For FTQC, we have to provide the AcceleratorBuffer

    QuantumRuntime& local_qrt = *qrt_impl.get();

    local_qrt.set_current_buffer(q.results());

    // Loop over sequential application of the 

    // gate instructions, get measurement feedback, and 

    // reset the state of the qubits.

    for (int i = 0; i < 20; i++) {

      local_qrt.h(q.head());

      local_qrt.cnot(q.head(), q.tail());

      auto r0 = local_qrt.mz(q[0]);

      auto r1 = local_qrt.mz(q[1]);

      if (r0 == r1) {

        print(i, "matched!");

      } else {

        print(i, "error!");

      }

      local_qrt.reset(q[0]);

      local_qrt.reset(q[1]);

    }

  }

}

 No newline at end of file

    if '@CMAKE_SYSTEM_NAME@' != 'Darwin':

        baseLibs += ['-lqir-qrt']

    baseIncludes = ['-I', '@XACC_ROOT@/include/xacc', '-I', '@CMAKE_INSTALL_PREFIX@/include/qcor',

    baseIncludes = ['-I', '@XACC_ROOT@/include/xacc', '-I', '@XACC_ROOT@/include/cppmicroservices4', '-I', '@CMAKE_INSTALL_PREFIX@/include/qcor',

                    '-I', '@XACC_ROOT@/include/quantum/gate', '-I', '@XACC_ROOT@/include/eigen']

    if '-internal-no-pch' in sys.argv[1:]:

        if verbose: