Fix: support npm workspaces

[asabil]

No description provided.

[asabil]

Not ready to merge yet, due to the function assetNameFromFilePath which makes assumptions about the location of node_modules/

    function assetNameFromFilePath(path: string): string {
        if (path.startsWith(compilerRoot)) {
            return path.substring(compilerRoot.length);
        }

        if (path.startsWith(projectRoot)) {
            return path.substring(projectRoot.length);
        }

        throw new Error(`unexpected file path: ${path}`);
    }

Would something like this fix it?

    function assetNameFromFilePath(path: string): string {
        if (path.startsWith(compilerRoot)) {
            return path.substring(compilerRoot.length);
        }

        if (path.startsWith(projectRoot)) {
            return path.substring(projectRoot.length);
        }

        if (path.includes("node_modules/")) {
            return path.replace(/.+node_modules\//, "");
        }

        throw new Error(`unexpected file path: ${path}`);
    }