Refactor ts declaration for context in luigi-client

[JohannesDoberer]

Currently we have a context ts declaration where everything is stored. It makes more sense to split it up like:

export declare interface Context{
nodeParams?: NodeParams;
  pathParams?: PathParams;
...
}

export declare interface MetaContext{
internal?: {
    userSettings?: getUserSettings;
  };
...
}

Also update client-support-angular lib.