open new buffer (#11203)

Release Notes:

- Allow creating new untitled buffers in remote projects

TODO:
- Add a Test
- Fix version number check

crates/editor/src/editor_tests.rs

@@ -7356,9 +7356,7 @@ async fn test_following(cx: &mut gpui::TestAppContext) {
     let project = Project::test(fs, ["/file.rs".as_ref()], cx).await;
 
     let buffer = project.update(cx, |project, cx| {
-        let buffer = project
-            .create_buffer(&sample_text(16, 8, 'a'), None, cx)
-            .unwrap();
+        let buffer = project.create_local_buffer(&sample_text(16, 8, 'a'), None, cx);
         cx.new_model(|cx| MultiBuffer::singleton(buffer, cx))
     });
     let leader = cx.add_window(|cx| build_editor(buffer.clone(), cx));
@@ -7565,12 +7563,8 @@ async fn test_following_with_multiple_excerpts(cx: &mut gpui::TestAppContext) {
 
     let (buffer_1, buffer_2) = project.update(cx, |project, cx| {
         (
-            project
-                .create_buffer("abc\ndef\nghi\njkl\n", None, cx)
-                .unwrap(),
-            project
-                .create_buffer("mno\npqr\nstu\nvwx\n", None, cx)
-                .unwrap(),
+            project.create_local_buffer("abc\ndef\nghi\njkl\n", None, cx),
+            project.create_local_buffer("mno\npqr\nstu\nvwx\n", None, cx),
         )
     });