editor: Fix TypeScript auto-import breaking generic function calls (#30312)

Closes #29982

When auto-importing TypeScript functions with generic type arguments
(like `useRef<HTMLDivElement>(null)`), the language server returns
snippets with placeholders (e.g., `useRef(${1:initialValue})$0`). While
useful for new function calls, this behavior breaks existing code when
renaming functions that already have parameters.

For example, completing `useR^<HTMLDivElement>(null)` incorrectly
results in `useRef(initialValue)^<HTMLDivElement>(null)`.

Related upstream issue:
https://github.com/microsoft/TypeScript/issues/51758
Similar workaround fix:
https://github.com/pmizio/typescript-tools.nvim/pull/147

Release Notes:

- Fixed TypeScript auto-import behavior where functions with generic
type arguments (like `useRef<HTMLDivElement>(null)`) would incorrectly
insert snippet placeholders, breaking the syntax.

crates/project/src/project.rs

@@ -5187,15 +5187,25 @@ impl ProjectItem for Buffer {
 }
 
 impl Completion {
+    pub fn kind(&self) -> Option<CompletionItemKind> {
+        self.source
+            // `lsp::CompletionListItemDefaults` has no `kind` field
+            .lsp_completion(false)
+            .and_then(|lsp_completion| lsp_completion.kind)
+    }
+
+    pub fn label(&self) -> Option<String> {
+        self.source
+            .lsp_completion(false)
+            .map(|lsp_completion| lsp_completion.label.clone())
+    }
+
     /// A key that can be used to sort completions when displaying
     /// them to the user.
     pub fn sort_key(&self) -> (usize, &str) {
         const DEFAULT_KIND_KEY: usize = 3;
         let kind_key = self
-            .source
-            // `lsp::CompletionListItemDefaults` has no `kind` field
-            .lsp_completion(false)
-            .and_then(|lsp_completion| lsp_completion.kind)
+            .kind()
             .and_then(|lsp_completion_kind| match lsp_completion_kind {
                 lsp::CompletionItemKind::KEYWORD => Some(0),
                 lsp::CompletionItemKind::VARIABLE => Some(1),