Repository overview sendgrid

[nitish24p]

Fixes #608

Checklist

• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the master branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added in line documentation to the code I modified

Short description of what this PR does:

Makes an overview of the repo so that any new developer has a starting point. :)

If you have questions, please send an email to Sendgrid, or file a Github Issue in this repository.

[nitish24p]

@thinkingserious please have a look, is the format ok.
Also i have had a look at mail, client and helpers, need some more info on the mail parser , contact importer and the widget.

Regards
Nitish

[nitish24p]

@mbernier Your suggestions here would be great..

[thinkingserious]

Hello @nitish24p,

One of us will be reviewing once this comes up next in our backlog. We are processing PRs from oldest to newest currently.

We apologize for the delay and appreciate your patience.

With Best Regards,

Elmer

[thinkingserious]

Hello @nitish24p,

Thanks again for the PR!

We appreciate your contribution and look forward to continued collaboration. Thanks!

Team SendGrid DX