[Vue] Add temperature converter solution

[bhumik-kalola]

Title and Issue number

Title : Added Temprature Coverter solution

Code Stack : Vue

Close #

Checklist:

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

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[sadanandpai]

@bhumik-kalola