### Description

Fixes a bug with text attachments that ended on the newline character in a line. Eg:
```
A
B
```
Text attachment added for range (0..<2) should result in:
```
[Attachment]B
```

Right now it results in the following visible lines.
```
[Attachment]B

```

Also introduces the ability for text attachments to respond to being selected and draw their contents differently.

### Related Issues

* CodeEditApp/CodeEditSourceEditor#43

### Checklist

- [x] I read and understood the [contributing guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md) as well as the [code of conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots

With new behavior:

https://github.com/user-attachments/assets/3cf665ab-1a9a-4de0-a835-9248d955ab5a

### Description

- When the undo or redo stack is empty, and the user tries to undo or redo, plays the beep sound.
- Removes the (now) unnecessary `DelegatedUndoManager` type that sent messages to the `CEUndoManager` type. This was a holdover from when we did not have a custom text view.
  - Made `CEUndoManager` a subclass of `UndoManager`
  - Added more overrides to more correctly conform to the `UndoManager` class.

### Related Issues

* closes #89

### Checklist

- [x] I read and understood the [contributing guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md) as well as the [code of conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots

### Description

Moves the `endUndoGrouping` call to the end of the actual editing operation when dropping text. Makes it so only one undo command is needed to undo a drag-and-drop operation.

### Related Issues

* closes #99

### Checklist

- [x] I read and understood the [contributing guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md) as well as the [code of conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots


https://github.com/user-attachments/assets/35952874-6d4d-4702-b149-f06b9ffb5226

### Description

Updates the undo manager to update the text selection when undoing/redoing.

Two cases:
- Replaced/Inserted text - selects the inserted text
- Deleted text - Places cursor at the start of the deleted text, as if the user had just deleted it.

### Related Issues

* closes #95

### Checklist

- [x] I read and understood the [contributing guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md) as well as the [code of conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots


https://github.com/user-attachments/assets/55309316-9106-4ce2-ac25-952e2addbbfe

### Description

Addresses an issue described by @nkleemann in the linked issue. The issue was a bug where cursors would lag behind an edit. This is due to the edited line's layout information being invalidated by the edit, meaning the selection manager cannot get valid layout information to position cursors.

This change puts a selection position update in the text view's `layout` call, after the layout manager has done it's layout pass. This ensures the selection manage is using valid layout information, fixing the lagging issue.

### Related Issues

* CodeEditApp/CodeEditSourceEditor#317

### Checklist

- [x] I read and understood the [contributing guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md) as well as the [code of conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots

On v0.11.2:

https://github.com/user-attachments/assets/f4f23e02-58e5-410b-ba1a-0ea5e449dce4

With this change:

https://github.com/user-attachments/assets/663fdecb-c1dd-43ec-9990-5f8c7da07205

### Description

Adds column selection when pressing option and dragging to select.

### Related Issues

* #46

### Checklist

- [x] I read and understood the [contributing guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md) as well as the [code of conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots

Demo, ignore the multiple undos at the end a fix for that is on it's way.

https://github.com/user-attachments/assets/409aa49c-eed2-465f-a964-162920c8877d

### Description

Fixes a bug that didn't allow the view to track drags outside it's bounds. Users can now drag selections over other views and outside the window.

### Related Issues

* closes #100
* closes CodeEditApp/CodeEditSourceEditor#316

### Checklist

- [x] I read and understood the [contributing guide](https://github.com/CodeEditApp/CodeEdit/blob/main/CONTRIBUTING.md) as well as the [code of conduct](https://github.com/CodeEditApp/CodeEdit/blob/main/CODE_OF_CONDUCT.md)
- [x] The issues this PR addresses are related to each other
- [x] My changes generate no new warnings
- [x] My code builds and runs on my machine
- [x] My changes are all related to the related issue above
- [x] I documented my code

### Screenshots

https://github.com/user-attachments/assets/ffbad5bf-5a56-4ef8-91f7-c5a9bb725208