adding qsearch example

from qcor import *

@qjit

def ccnot(q : qreg):

    # create 111

    for i in range(q.size()):

        X(q[i])

    with decompose(q, qsearch) as ccnot:

        ccnot = np.eye(8)

        ccnot[6,6] = 0.0

        ccnot[7,7] = 0.0

        ccnot[6,7] = 1.0

        ccnot[7,6] = 1.0

    # CCNOT should produce 110 (lsb)

    for i in range(q.size()):

        Measure(q[i])

q = qalloc(3)

ccnot(q)

counts = q.counts()

print(counts)