Clean Code

[NOBTG]

清理部分Code，对于不需要被继承的一般类加上final属性，修正部分注释，删除多余的空行，长switch更换，更换AvaritiaShader当中使用RenderStateShard的protected的字段为RenderStateShardAccess的private字段，增加RenderStateShardAccess内部类。 Clean up part of the Code, add final attributes to general classes that do not need to be inherited, correct some comments, delete redundant blank lines, replace long switches, replace the protected fields of RenderStateShard in AvaritiaShader with private fields of RenderStateShardAccess, and add the RenderStateShardAccess internal class .

Checks / 检查

• [X] I confirm that I have searched for existing issues / pull requests before requesting to avoid duplicate requesting./我确认在报告之前我已经搜索了现有的问题或者拉取请求，以避免重复报告。
• [X] I confirm that I noted that if I don't follow the instructions, the issue may be closed directly./我确认我已经检查，如果我不按照说明进行操作，该问题可能会被直接关闭。

Related Issues

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[NOBTG]

@cnlimiter

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