add english readme for cpp maker

maker/cpp/README.md

@@ -0,0 +1,9 @@
+# :cn: [中文简体]
+
+1. [生成 xdb 文件](../../binding/cpp#4-生成-xdb-文件)
+2. [原始数据编辑](../../binding/cpp#5-原始数据编辑)
+
+# :globe_with_meridians: [English]
+
+1. [make xdb file](../../binding/cpp##4-generate-xdb-file)
+2. [source data editor](../../binding/cpp#5-raw-data-editing)

maker/cpp/readme.md

@@ -1,5 +0,0 @@
-
-[生成 xdb 文件](../../binding/cpp#4-生成-xdb-文件)
-
-[原始数据编辑](../../binding/cpp#5-原始数据编辑)
-