[feat] Credentials mode in easytier-gui

功能类别 / Feature Category

用户界面 / User Interface

使用场景 / Use Case

• As an client of secure-mode network and as a user of easytier-gui I have credential provided by system administrator

当前限制 / Current Limitations

• As an easytier-gui user I have no option to pass given credential into network setup configuration

建议的解决方案 / Proposed Solution

• Add option enable secure mode
• Add option credential
• Options available in toml configuration
• Options available in easytier-gui interface

预期收益 / Expected Benefits

• Ease of use and expansion of secure mode

技术考虑 / Technical Considerations

No response

备选方案 / Alternative Solutions

No response

实现优先级 / Implementation Priority

• Limits integration on technical personal level
• Blocks full integration

补充信息 / Additional Context

No response