feat: dashboard welcomes user by their name

[dickeyy]

Fixes: #372

Proposed Changes

• Change the dashboard welcome message from "Good Afternoon, Ahmed!" to "Good Afternoon, {user}!"
• Checks if user.firstName exists otherwise it uses user.emailAddresses[0].emailAddress.split("@")[0].split(".")

Ex:

[vercel]

@dickeyy is attempting to deploy a commit to the Noodle Team on Vercel.

A member of the Team first needs to authorize it.

[ixahmedxi]

Thank you, this looks great!