Add option to hide donation message

[ItsProfessional]

The Problem

When adding a mod or modpack, and the author has a donation link, ferium tells the user to consider donating to the author. This isn't a problem when installing mods normally, but when mass installing tons of mods using a script, it clutters up the output.

For example, this:

ferium add x && ferium add y && ferium add z && ferium add a && ferium add b && ferium add c

results in this output:

Adding mod... ✓ x
Consider supporting the mod creator on X (https://paypal.me/author)
Adding mod... ✓ y
Consider supporting the mod creator on X (https://paypal.me/author)
Adding mod... ✓ z
Consider supporting the mod creator on X (https://paypal.me/author)
Adding mod... ✓ a
Consider supporting the mod creator on X (https://paypal.me/author)
Adding mod... ✓ b
Consider supporting the mod creator on X (https://paypal.me/author)
Adding mod... ✓ c
Consider supporting the mod creator on X (https://paypal.me/author)

Your Solution(s)

Add a flag like --hide-donation-message that suppresses the donation message.