[FEATURE] Userinfo command

[anf]

A userinfo command that displays known information about a user. BotANF v1 has this command, here's a preview:

The new embed will be inspired by it.

What it'll have:

• Username
• ID
• Join Date
• User Created
• Number of infractions
• User's profile picture preview
• (Conditional field) User Nickname
• The embed color will be equal to the role color that is the highest on the user.

All these in an inline field as shown in that image.