Refactor email templates to reduce duplication

[coderabbitai]

As discussed in PR #289, we need to refactor the 'reset' and 'verify' email templates to reduce code duplication. This involves creating a utility or shared template for better maintainability.

Reference comment: GitHub Comment

Assigned to: @Bran18

[Bran18]

The described issue is addressed as part of the changes in this PR: #301