Support node module imports in addUrlDependency

[DeMoorJasper]

🙋 feature request

addUrlDependency, currently does not support node modules properly afaik.

I can implement this myself, just wondering what the syntax should be for this kind of import.

Example of where this would be usefull

.something {
   background-image: url('node_module/icon.svg');
}

🤔 Expected Behavior

addUrlDependency should be able to import node_modules

😯 Current Behavior

addUrlDependency can't import node_modules

💁 Possible Solution

Do something similar to how css imports work
~node_module => node_module
~/path/file => root path

🔦 Context

Trying to import an icon from an icon package in a monorepo.

💻 Examples

.searchbar {
  background: transparent;
  border: none;
  padding: 10px 20px 10px 50px;
  border-radius: 25px;
  color: $black;
  width: 100%;
  font-size: $font-size-14;

  /* This does not work atm */
  background-image: url("~@zf/icons/icons/search-icon.svg");
  background-repeat: no-repeat;
  background-size: 20px;
  background-position: 15px center;
}

[devongovett]

I think we are planning to support npm: protocol URLs in v2, so going to close this in favor of #3492 (comment).