favicon added

[nagamukesh]

i have added the faviocn and there are no conflicts at the time of this pull request I have added relevant favicon icon and made it visible over the tab Fixes #19

• [x] I follow CONTRIBUTING GUIDELINE & CODE OF CONDUCT of this project.
• [x] I have performed a self-review of my own code or work.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] My changes generates no new warnings.
• [x] I have followed proper naming convention showed in CONTRIBUTING GUIDELINE
• [x] I have added screenshot for review.

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