🐞 Font resize doesn't cause layout for lines previously outside the viewport

### Description

When changing font size the number of lines in the viewport may change if the difference in size is large enough. This causes lines to be displayed, but layout regeneration is not caused until something like a scroll action occurs.

### To Reproduce

1. Open a document
2. Change the font size to something large (20)
3. Change the font size to something small (4)

Observe that there are lines visible with the previous font size.

### Expected Behavior

Changing the font size should cause layout for all visible lines.

### Version Information

CodeEditTextView: main (40d8e88)
macOS: 13.6.1
Xcode: 15.0

### Additional Context

_No response_

### Screenshots

https://github.com/CodeEditApp/CodeEditTextView/assets/35942988/2b29e52f-0a22-4db6-bdfa-7908a4478bc0

首先在 CodeEditTextView 中复现字体大小序列：打开一个文档，将大小改为 20，然后改为 4，并在滚动前观察可见行。跟踪字体大小变化在可见行布局中的传递；当所有可见行都能立即以新大小完成布局且无需滚动操作时，即表示完成。

由索引模型根据 Issue 内容生成。