ESLint plugin false positive for `no-unused-class-names` with `composes`

[OliverJAsh]

Example:

.container {
  padding: 4px;
}

.containerBordered {
  composes: container;

  border: 1px solid black;
}

container will be reported as unused, but it is used (composes: container).

[mizdra]

Implementing this feature will likely be a bit challenging. This is because the CSS Modules Kit currently lacks code to parse the value of the composes property. We'll need to implement that first.

Additionally, the container part in composes: container; is a reference, not a token definition. This means that if you perform "Go to Definition" on container, it will jump to the class selector on line 1 (.container). CSS Modules Kit currently lacks the mechanism to implement references. Therefore, we also need to implement that mechanism.