Added Ui code for Quantum Entanglement State

[Gaurang-Belekar]

Algorithm Demonstration Title

Code for GHZ and W State

Description

Related Issue

Fixes #7

Checklist: Make sure the following sections are present on the demonstration page

• Demonstration (Users should be able to tweak options. Show the output circuit, measurement results, and histogram to the user.)
• Detailed explanation including mathematics and examples (wherever required) divided into multiple sections.
• Generalized and modular code for the algorithm. (See the code given in Bernstein Vazirani and Deutsch Josza Algo Pages for reference).
• Links to external sources and further study material.
• About the author (small description and socials).

[Gaurang-Belekar]

@devilkiller-ag code changed as per review