添加文档构建文件，方便本地测试 [no ci] (#188)

Author: NHZEX

mddoc/.gitignore

@@ -0,0 +1,3 @@
+output
+vendor
+composer.lock

mddoc/build.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -eu
+
+cd "$(dirname $0)"
+
+if [ ! -d "./vendor" ]; then
+  composer update
+fi
+
+if [ -d './output' ]; then
+  rm -r ./output
+fi
+
+php ./vendor/bin/build.php -markdownPath ../doc -htmlPath ./output
+
+echo "open file ($PWD/output/index.html) preview"