Add ms marketplace version and ratings badge.

[Tatsinnit]

Following PR enables the vscode-marketplace badges for the repo.

The new changes will add these 2 details, I learned about this via this repo: https://github.com/microsoft/vscode-js-debug

It looks like this:

Extra:

Also might be if anyone keen why the build badge won't work is because:

Some details about this issue here:

• Error: SVGs cannot be used as icons microsoft/vscode-vsce#183
• README rendering doesn't handle relative/local SVG images isaacs/github#316
• https://stackoverflow.com/questions/13808020/include-an-svg-hosted-on-github-in-markdown/16462143#16462143

Thank you so much in advance: ☕️🙏cc: @squillace, @itowlson, @lstocchi and @rzhang628 and wish you all happy New Years. ❤️🙏

[rzhang628]

This looks good to me. You can push it to merge. Thanks!