feat: add placeholder line content in local_search result

Display placeholder line content with local_search result.
Since columns expect a fn and not a closure it proved challenging
to extract data from cx.editor without borrowing cx within the scope.

For now a placeholder line content is placed until we fix this.

helix-term/src/commands.rs

@@ -2679,13 +2679,21 @@ fn local_search(cx: &mut Context) {
 
     let columns = [
         PickerColumn::new("path", |item: &FileResult, config: &LocalSearchConfig| {
-            Cell::from(Spans::from(
+            let line_num = (item.line_num + 1).to_string();
-                // only show line numbers in the left picker column
+            // files can never contain more than 999_999_999_999 lines
-                vec![Span::styled(
+            // thus using maximum line length to be 12 for this formatter is valid
-                    (item.line_num + 1).to_string(),
+            let max_line_num_length = 12;
-                    config.number_style,
+            // whitespace padding to align results after the line number
-                )],
+            let padding_length = max_line_num_length - line_num.len();
-            ))
+            let padding = " ".repeat(padding_length);
+            // extract line content from the editor
+            let line_content = "<insert line content here>";
+            // create column value to be displayed in the picker
+            Cell::from(Spans::from(vec![
+                Span::styled(line_num, config.number_style),
+                Span::raw(padding),
+                Span::raw(line_content),
+            ]))
         }),
         PickerColumn::hidden("contents"),
     ];