Unstable-Ember-Language server integration?

[lifeart]

VSCode addon: https://marketplace.visualstudio.com/items?itemName=lifeart.vscode-ember-unstable

Usecase: https://code.visualstudio.com/api/language-extensions/programmatic-language-features#find-all-references-to-a-symbol

context: NullVoxPopuli/coc-ember#9

Fild all references to a symbol

proposed api:

"ember-language-server": {
    "entry": "./lib/langserver",
    "referencesProvider": true
}

module.exports.onReference = async function(projectRoot, { itemType: 'COMPONENT', itemName: 'normalized/component/name' }) {
        return [
         { path: "app/templates/route-name/route.hbs", position: { line: 0, character: 12 } },
         { path: "app/templates/route-name/route.hbs", position: { line: 10, character: 12 } }
        ];
    }
}

//cc @NullVoxPopuli