feature request: Constrain cursor in insert mode

[ayles]

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Describe the feature

As I understand, currently cursor is constrained in normal and visual modes (CursorMoved). Is it possible to constrain it in insert mode (CursorMovedI, I believe)?

Provide background

I use arrows on my keyboard a lot and current behavior is a bit inconsistent with normal mode, especially when dealing with concealed column with entry index (it can be "walked left" by cursor and then should be "unwalked right").

What is the significance of this feature?

nice to have

Additional details

No response