`assets` folder is missing from `examples` folder

[markusgritsch]

When installing Nico using nimble install nico, the examples folder does not contains the assets folder, which prevent new users from trying out the examples.

[ftsf]

nimble install nico isn't supposed to install examples, if it's creating that directory its probably a mistake, from what I understand nimble doesn't support extra files like this.

To get the examples you'll need to clone the repository. But perhaps nicoboot could have a command to install the examples.