I'm new to this adding stuff to Minecraft thing. I understand that Forge is (mostly, I think) client side, and Spigot is (mostly, I think) server side. Both use jars. Is there a difference? Can I just dump Forge files (if there's a difference) into a Spigot server and vice versa? As of right now, I have Minecraft with forge on it, and I want to run a plugin of some sort (which, right there, I think is a red flag) on it, which seems to be for Spigot. How do I know if it's running? If I do not see it in the "Mods" menu in the main menu, is it not running?