Add a newsletter form

[dolhescu]

Checklist

• I have read and accepted the contributing guidelines.

Is your feature request related to a problem? Please describe

In order to get engaged with our blog readers, I think a newsletter form can be natively supported.

Describe the solution you'd like

I am not familiar with web design best practices. I am not sure where this form can be displayed, but I absolutely know that can be a very important feature.

Describe alternatives you've considered

I don't have any alternatives at the moment.

Additional context

If this feature is considered a "feature creep", please let me know what could be the alternatives.

[dolhescu]

Here is an example:

[ksashok]

This would be a really useful feature to have. Looking forward for someone to contribute.

[nenandjabhata]

Hello, How can i contribute to this one ?

[sionta]

Hello, How can i contribute to this one ?

see https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/docs/CONTRIBUTING.md