Add tests for indexers and properties with parameters in tooltips

Address review feedback: verify that indexers and properties with
explicit getters are correctly tagged as Property (not Method) in
tooltips.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: T-Gro

tests/FSharp.Compiler.Service.Tests/TooltipTests.fs

@@ -660,3 +660,33 @@ type Bar() =
     member val Fo{caret}o = "bla" with get, set
 """
     |> assertNameTagInTooltip TextTag.Property "Foo"
+
+// https://github.com/dotnet/fsharp/issues/10540
+[<Fact>]
+let ``Indexer should be tagged as Property`` () =
+    Checker.getTooltip """
+type T() =
+    member x.Ite{caret}m with get(i: int) = i
+"""
+    |> assertNameTagInTooltip TextTag.Property "Item"
+
+// https://github.com/dotnet/fsharp/issues/10540
+[<Fact>]
+let ``Indexer with getter and setter should be tagged as Property`` () =
+    Checker.getTooltip """
+type T() =
+    let mutable data = [| 0; 1; 2 |]
+    member x.Ite{caret}m
+        with get(i: int) = data.[i]
+        and set (i: int) (v: int) = data.[i] <- v
+"""
+    |> assertNameTagInTooltip TextTag.Property "Item"
+
+// https://github.com/dotnet/fsharp/issues/10540
+[<Fact>]
+let ``Property with explicit getter should be tagged as Property`` () =
+    Checker.getTooltip """
+type T() =
+    member x.Valu{caret}e with get() = 42
+"""
+    |> assertNameTagInTooltip TextTag.Property "Value"