Renames: HighlightedText->HighlightedMatch + HighlightedEdits->HighlightedText (#24057)

In support of work on
https://github.com/zed-industries/zed/tree/new-ui-for-edit-prediction-with-lsp-completions,
where we want to be able to extract a range of the buffer as
`HighlightedText`.

Release Notes:

- N/A

crates/language/src/buffer.rs

@@ -596,7 +596,7 @@ pub struct EditPreview {
 }
 
 #[derive(Default, Clone, Debug)]
-pub struct HighlightedEdits {
+pub struct HighlightedText {
     pub text: SharedString,
     pub highlights: Vec<(Range<usize>, HighlightStyle)>,
 }
@@ -608,9 +608,9 @@ impl EditPreview {
         edits: &[(Range<Anchor>, String)],
         include_deletions: bool,
         cx: &App,
-    ) -> HighlightedEdits {
+    ) -> HighlightedText {
         let Some(visible_range_in_preview_snapshot) = self.compute_visible_range(edits) else {
-            return HighlightedEdits::default();
+            return HighlightedText::default();
         };
 
         let mut text = String::new();
@@ -686,7 +686,7 @@ impl EditPreview {
             cx,
         );
 
-        HighlightedEdits {
+        HighlightedText {
             text: text.into(),
             highlights,
         }

crates/language/src/buffer_tests.rs

@@ -2739,7 +2739,7 @@ async fn test_preview_edits(cx: &mut TestAppContext) {
         edits: Vec<(Range<Point>, &str)>,
         include_deletions: bool,
         cx: &mut TestAppContext,
-        assert_fn: impl Fn(HighlightedEdits),
+        assert_fn: impl Fn(HighlightedText),
     ) {
         let buffer = cx.new(|cx| Buffer::local(text, cx).with_language(Arc::new(rust_lang()), cx));
         let edits = buffer.read_with(cx, |buffer, _| {