Add translations and testing framework.

src/util/ipcTypes.json

@@ -1,6 +1,7 @@
 {
   "toMain": {
-    "test": "toMain_test"
+    "test": "toMain_test",
+    "authStateChanged": "toMain_authStateChanged"
   },
   "toRenderer": {
     "test": "toRenderer_test"

src/util/translations/en-US/main.json

@@ -0,0 +1,5 @@
+{
+	"toolbar": {
+		"help": "Help"
+	}
+}

src/util/translations/en-US/renderer.json

@@ -0,0 +1,8 @@
+{
+	"translation": {
+		"navigation": {
+			"home": "Home",
+			"settings": "Settings"
+		}
+	}
+}