添加 phpDocumentor 构建配置

.gitignore

 .idea
-
 /vendor/
+/build/
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phpdoc.xml

+<?xml version="1.0" encoding="UTF-8" ?>
+<phpdoc>
+    <title>InternalApi</title>
+    <transformer>
+        <target>docs/api</target>
+    </transformer>
+    <parser>
+        <visibility>
+            <item>public</item>
+        </visibility>
+    </parser>
+    <files>
+        <directory>src</directory>
+        <ignore>src/base</ignore>
+    </files>
+</phpdoc>
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