doc: update readme

- update readme
- add license
- remove the reference to reality university in example

LICENSES/MIT.txt

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+The MIT License (MIT)
+
+Copyright (c) 2026 yyc12345
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

LICENSES/README.md

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+# 许可证
+
+本项目采用混合许可证模式。
+
+## 专有资产
+
+本项目中的以下文件来自AUST，并被AUST版权所有，AUST对其保留所有权利。
+
+- `aust-logo-banner.jpg`
+- `aust-nologo-banner.png`
+
+## 开源资产
+
+除上述专有资产外，其余资产均以[MIT许可证](./MIT.txt)进行开源。