18n for the language server, cli & vscode-graphql

[acao]

as a user accessibility concern, we should find a way to localise all aspects of the LSP server ecosystem, just as we will with graphiql in 3.0.0 ideally. the tooltips, the output channel logging output is important right now for even understanding whats going on with the language server.

we can retrieve the user locale from the client, and send it to the server, of course, because LSP

https://github.com/microsoft/vscode-languageserver-node/blob/2e2658c897fbd20e134076f685da005d173d5e92/client/src/node/main.ts#L558