New domain name and official emails for Sniffnet

[GyulyVGC]

Here we go with a brand refresh for Sniffnet!

The old domain (sniffnet.net) was chosen in a hurry, and as time passed I grew more and more dissatisfied with it,
especially because of the "net" repeating in the app name and TLD.

Additionally, I originally acquired the domain without enabling the mail service, which made it impossible to have official emails for the project.

I could've just updated the old plan to add emails, but I took the opportunity to also change the domain name to sniffnet.app, which is more fitting for a software project and sounds less awkward.

Along with the new domain, I finally set up 3 official mailboxes:

• info@sniffnet.app for general inquiries
• security@sniffnet.app for security-related matters and vulnerability reports
• sponsor@sniffnet.app for sponsor inquiries and partnership opportunities

Read the blog post for more details.