If so, then how do I make one? Can I get a template from somewhere or something? (I want to build vehicle parts btw)

There are a lot of things that are possible, but if you are wanting to create something yourself, then I'd first get familiar with C# and existing plugins to get a general idea.

Thank you for the quick response, I will look forward into it.

Depends how you want your plugin to work, I think the easier way of 'crafting' something through the plugin would be with some type of chat command, look up the player's inventory for certain items, it player has everything needed destroy the items and give him the item you want.