Added Memory Game in JS

[kiruba-r11]

Description

• It has a 4 * 4 grid and clicking two tiles with the same images gives a score, else it hides again.
• The game has a scoring formula so that after each move, the LIVE SCORE of the player will be displayed.
• It also has music for correct, wrong match and also for game end.

Fixes: #29

Type of change

• This change requires a documentation update

Checklist:

• My code follows the style guidelines(Clean Code) of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests/screenshots(if any) that prove my fix is effective or that my feature works