Selectable diagnostic popover text (#14518)

Release Notes:

- Added the ability to select and copy text from diagnostic popovers

- Fixed #12695




https://github.com/user-attachments/assets/b896bacf-ecbc-48f5-8228-a3821f0b1a4e

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/markdown/src/parser.rs

@@ -88,6 +88,41 @@ pub fn parse_markdown(text: &str) -> Vec<(Range<usize>, MarkdownEvent)> {
     events
 }
 
+pub fn parse_links_only(text: &str) -> Vec<(Range<usize>, MarkdownEvent)> {
+    let mut events = Vec::new();
+    let mut finder = LinkFinder::new();
+    finder.kinds(&[linkify::LinkKind::Url]);
+    let mut text_range = Range {
+        start: 0,
+        end: text.len(),
+    };
+    for link in finder.links(&text[text_range.clone()]) {
+        let link_range = text_range.start + link.start()..text_range.start + link.end();
+
+        if link_range.start > text_range.start {
+            events.push((text_range.start..link_range.start, MarkdownEvent::Text));
+        }
+
+        events.push((
+            link_range.clone(),
+            MarkdownEvent::Start(MarkdownTag::Link {
+                link_type: LinkType::Autolink,
+                dest_url: SharedString::from(link.as_str().to_string()),
+                title: SharedString::default(),
+                id: SharedString::default(),
+            }),
+        ));
+        events.push((link_range.clone(), MarkdownEvent::Text));
+        events.push((link_range.clone(), MarkdownEvent::End(MarkdownTagEnd::Link)));
+
+        text_range.start = link_range.end;
+    }
+
+    events.push((text_range, MarkdownEvent::Text));
+
+    events
+}
+
 /// A static-lifetime equivalent of pulldown_cmark::Event so we can cache the
 /// parse result for rendering without resorting to unsafe lifetime coercion.
 #[derive(Clone, Debug, PartialEq)]