WIP: feat(angular): add groovy in angular

[ls-infra]

as discussed in https://github.com/TypeFox/monaco-languageclient/pull/763 , adding groovy editor to angular to support multiple lang mode like https://microsoft.github.io/monaco-editor/ , (this will be a good starting point as well to attract angular devs to contribute to enhance the wrapper together.)

but i am getting below error ,
my first guess will be that https://github.com/TypeFox/monaco-languageclient/blob/main/verify/angular/package.json#L23 is overriding the original monaco-editor modules ?

thanks