Feature: 优化 Cannot find module 错误提示

[Ice-Hazymoon]

Describe the problem related to the feature request

参见 https://github.com/koishijs/koishi/issues/1021

Describe the solution you'd like

出现此错误时检测 workspaces 的插件文件夹中是否包含此插件，如果不包含，提醒用户重建 node_modules

Describe alternatives you've considered

No response

Additional context

No response

[shigma]

由于 config 已经改成按需加载，此问题现在已经解决。