Create program-cys-charteditor-preview.md

Author: Chen-Luan

docs/exhibition/program-cys-charteditor-preview.md

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+# CyS 谱面编辑器（预览）
+
+由我参与开发的 CyanStars 游戏内置谱面编辑器，CyanStars 是一款 VC 同人非商开源社区音游。
+
+<div style="position: relative; padding: 30% 45%;">
+<iframe style="position: absolute; width: 100%; height: 100%; left: 0; top: 0;" src="//player.bilibili.com/player.html?aid=115196743915772&page=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"></iframe>
+</div>