Add an example for sympy.physics.quantum.qapply.
Add an example for sympy.physics.quantum.qapply.

kaushik94/sympy,yashsharan/sympy,skidzo/sympy,chaffra/sympy,jaimahajan1997/sympy,chaffra/sympy,yashsharan/sympy,madan96/sympy,jaimahajan1997/sympy,yashsharan/sympy,skidzo/sympy,kaushik94/sympy,jaimahajan1997/sympy,madan96/sympy,skidzo/sympy,chaffra/sympy,madan96/sympy,kaushik94/sympy