add placeholder greek i18n file

src/lib/translations.js

@@ -12,6 +12,11 @@ const config = {
 			locale: "nb",
 			key: "common",
 			loader: async () => (await import("../i18n/nb.json")).default
+		},
+		{
+			locale: "el",
+			key: "common",
+			loader: async () => (await import("../i18n/el.json")).default
 		}
 	]
 };