Add filter to do a basic email obfuscation

[imorlxs]

Email Obfuscation Implementation

Context

This implementation addresses the email protection concern raised in the Compiler Research Group Discord (November 7, 2025). The discussion highlighted the need to protect team members' email addresses from automated harvesting while maintaining human readability.

NOTE: This PR only applies the obfuscation in the members emails. The footer ones or any other email hardcoded is not obfuscated.

Implementation Details

Added a reusable Jekyll include component that transforms email addresses using simple text substitution:

• @ becomes [at]
• . becomes [dot]

For example:

user@example.com → user[at]example[dot]com

Usage

To display an obfuscated email address in any template, use:

{% include email-display.html email=member.email %}

Implementation Details

The core logic is implemented in email-display.html:

{% assign obfuscated_email = include.email | replace: "@", "[at]" | replace: ".", "[dot]" %}
<p><i>email: {{ obfuscated_email }}</i></p>

Security Note

This implementation provides basic protection against automated email harvesting while maintaining human readability. Future enhancements could include JavaScript-based solutions or contact forms for additional security.

[vgvassilev]

Thank you @imorlxs!