Stores the Bootstrap Package in assets/contao-component-bootstrap
f.ex if your main.scss is located in files/mytheme/scss/main.scss
you can import bootstrap like this:
/**
files/mytheme/scss/main.scss
**/
// Import the bootstrap component from the assets directory
@import "../../../assets/contao-component-bootstrap/bootstrap/scss/bootstrap.scss";
// Import some other custom style definitions
@import "base/page";
@import "base/layout";
@import "base/type";
// etc.