Initial version of i18n-sample

To keep things simple, this doesn't use the nls-dev package. I think this demystifies a lot of things when you see what is actually going on behind the scenes.

i18n-sample/src/command/sayBye.nls.ja.json

@@ -0,0 +1 @@
+["さようなら"]

i18n-sample/src/command/sayBye.nls.json

@@ -0,0 +1,4 @@
+{
+  "messages": ["Bye"],
+  "keys": ["sayBye.text"]
+}

i18n-sample/src/command/sayBye.ts

@@ -11,4 +11,4 @@ const localize = nls.loadMessageBundle();
 export function sayByeCommand() {
 	const message = localize('sayBye.text', 'Bye')
 	vscode.window.showInformationMessage(message);
-}
+}