Updated init py following best practices

Author: Gopal-Dahale

torchquantum/algorithm/__init__.py

@@ -22,8 +22,8 @@
 SOFTWARE.
 """
 
-from .vqe import *
-from .hamiltonian import *
-from .qft import *
-from .grover import *
-from .qcbm import *
+from .vqe import VQE
+from .hamiltonian import Hamiltonian
+from .qft import QFT
+from .grover import Grover
+from .qcbm import QCBM, MMDLoss