Add estimated time to fully vaccinate people

[il3ven]

Is your feature request related to a problem? Please describe.
There are claims to fully vaccinate the people by the end of 2021. Claims are useless if not backed by data. It would be good to have an estimate time to fully vaccinate people as per the current average speed.

Describe the solution you'd like
The solution is to show some text which for example says It will take 14 months to fully vaccinate people as per the current speed of 1.5 lakh doses per day.. The average speed can be calculated like this.

avg_doses_per_day = doses_administered_this_month / no_of_days_in_this_month

days_to_vaccinate_people = population_of_india / avg_doses_per_day

Describe alternatives you've considered
None

Additional context
I am willing to open a PR for this.

[Aayush-Bhatt]

I am willing to open a PR for this.

[Ashis26]

I can contribute to this if you want

[il3ven]

I made a website for this statistic as a way to improve my frontend skills. Check it out if you are interested. https://etacovidindia.netlify.app/