Add more available model values to all email templates

As a client some basic information available on all the email templates, to provide a better experience to our customers.

WebsiteUrl -> Will help link back from the email back to the website. This variable is available on some templates, but not all.

LogoImagePath -> Will help stylize the emails with the company logo. This variable is available on some templates, but not all.

WebsiteName -> This will help make the website name visible and more recognizable.

CurrentYear -> To be used on the copyright footer, so we don't need to update the templates on every year change.