Apply line height when change to value is made (#179)

### Description

Currently there is no change when the line height setting is changed,
you had to reopen the file. This PR fixes that to apply the new value
when it is changed.

### 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://user-images.githubusercontent.com/806104/234170447-b8a1b481-dd05-4f88-86b2-821ce37cb831.mp4

Author: austincondiff

Sources/CodeEditTextView/Controller/STTextViewController.swift

@@ -288,6 +288,7 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
         textView?.isEditable = isEditable
         textView.highlightSelectedLine = isEditable
         textView?.typingAttributes = attributesFor(nil)
+        paragraphStyle = generateParagraphStyle()
         textView?.defaultParagraphStyle = paragraphStyle
 
         rulerView?.backgroundColor = useThemeBackground ? theme.background : .clear