[Vue] Basic stopwatch app with Vuejs

[Shardik04]

Title and Issue number

Title : Stopwatch with Vuejs

Issue No. : #370

Code Stack : Vuejs

Close #370

Checklist:

• [x] I have mentioned the issue number in my Pull Request.
• [x] I have commented my code, particularly in hard-to-understand areas
• [] I have created a helpful and easy to understand README.md
• [] I have updated the Index.html file for my contribution

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[sadanandpai]

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