feat: support *.properties resource files

test/locales/de.properties

@@ -0,0 +1,3 @@
+Email = Emailde
+"Hello %s, how are you today?" = "Hallo %s, wie geht es dir heute?"
+Hello %s, how are you today? How was your %s. = Hallo %s, wie geht es dir heute? Wie war dein %s.

test/locales/zh-CN.js

@@ -1,4 +1,4 @@
 module.exports = {
-  'Email': '邮箱',
+  Email: '邮箱',
   'Hello %s, how are you today?': '%s，今天过得如何？',
 };

test/locales/zh_TW.json

@@ -1,3 +1,4 @@
 {
-  
+  "Email": "郵箱",
+  "Hello %s, how are you today?": "%s，今天過得如何？"
 }