Add ToString override for workspace documents

Agent-Logs-Url: https://github.com/PowerShell/PowerShellEditorServices/sessions/7e3e8a1d-f66b-4f87-8bde-eb0dd19f928c

Co-authored-by: JustinGrote <15258962+JustinGrote@users.noreply.github.com>

Author: Copilot

src/PowerShellEditorServices/Extensions/EditorWorkspace.cs

@@ -21,6 +21,12 @@ internal EditorWorkspaceDocument(EditorWorkspace workspace, string path)
         /// </summary>
         public string Path { get; }
 
+        /// <summary>
+        /// Gets the full path of this document.
+        /// </summary>
+        /// <returns>The full document path.</returns>
+        public override string ToString() => Path;
+
         /// <summary>
         /// Opens this document in the editor.
         /// </summary>

test/PowerShellEditorServices.Test/Extensions/EditorWorkspaceTests.cs

@@ -54,6 +54,21 @@ public void DocumentOpenSaveAndCloseUseWorkspaceOperations()
                 call => Assert.Equal("CloseFile:" + filePath, call));
         }
 
+        [Fact]
+        public void DocumentToStringReturnsDocumentPath()
+        {
+            const string filePath = @"C:\test\file.ps1";
+            TestEditorOperations editorOperations = new()
+            {
+                OpenDocumentPaths = new[] { filePath }
+            };
+
+            EditorWorkspace workspace = new(editorOperations);
+            EditorWorkspaceDocument document = Assert.Single(workspace.Documents);
+
+            Assert.Equal(filePath, document.ToString());
+        }
+
         private sealed class TestEditorOperations : IEditorOperations
         {
             public string[] OpenDocumentPaths { get; set; } = Array.Empty<string>();