RY_2mode_3ch_keyboard：1.解决初始化后flash读写异常，删除flash powerdown；2.增加Fn+F8系统设置功能；3.部分函数放在zcode;
Review Request #10361 — Created June 4, 2025 and updated — Latest diff uploaded
| Information | |
|---|---|
| chenjianrong | |
| YC1305 | |
| Reviewers | |
| chenjianrong, luoyuxi | |
1.解决初始化后flash读写异常，删除flash powerdown；2.增加Fn+F8系统设置功能；3.部分函数放在zcode;