All your notes are just simple text files - so are your links: special text fields that are interpreted as a link by the app. Your vault is actually just a simple folder where your text files live, plus it contains a hidden .obsidian folder that contains all your plugins, settings, etc.
To sum up: if you copy your complete vault (means: the folder where your md files live) and open it as a new vault from within obsidian, everything - including appearance, settings, installed plugins - will be exactly the same as before. 