Add support for renaming PowerShell class references

Prerequisites

• I have written a descriptive issue title.
• I have searched all open and closed issues to ensure it has not already been reported.
• I have read the troubleshooting guide.
• I am sure this issue is with PowerShell Editor Services itself and does not reproduce in a standalone PowerShell instance, and is not an issue with my editor.
• I have verified that I am using the latest version of PowerShell Editor Services.
• If this is a security issue, I have read the security issue reporting guidance.

Summary

This is not a bug, but the README says that rename scenarios should be filed as bug reports, so that's what I'm doing.
I think it should be fairly trivial to add renaming support for PowerShell classes defined in the same script file.
Expected:

class DemoClass
{
    [string] $SomeProperty

    DemoClass ([string] $SomeArg)
    {
        $this.SomeProperty = $SomeArg
    }
}

[DemoClass]

Actual:

class NewName
{
    [string] $SomeProperty

    NewName ([string] $SomeArg)
    {
        $this.SomeProperty = $SomeArg
    }
}

[NewName]

One thing to keep in mind during implementation is that a PowerShell class can also be used to define an attribute, and an attribute type can drop the optional Attribute suffix in an attribute context as seen here:

class ValidateSomethingAttribute : System.Management.Automation.ValidateArgumentsAttribute
{
    [void]Validate([System.Object]$arguments, [System.Management.Automation.EngineIntrinsics]$engineIntrinsics)
    {
    }
}
[ValidateSomething()][string]$Path = "c:\windows"

PowerShell Version

Name                           Value
----                           -----
PSVersion                      7.6.1
PSEdition                      Core
GitCommitId                    7.6.1
OS                             Microsoft Windows 10.0.26200
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.4
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Editor Version

VS code:

Version: 1.117.0 (system setup)
Commit: 10c8e557c8b9f9ed0a87f61f1c9a44bde731c409
Date: 2026-04-21T16:12:14-07:00
Electron: 39.8.7
ElectronBuildId: 13841579
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.26200

PowerShell Editor Services Version

Major  Minor  Build  Revision
-----  -----  -----  --------
4      6      0      0

Steps to Reproduce

Use the code blocks from before and press F2 on the class name references.

Visuals

No response

Logs

No response

まず2つのクラス例を再現し、クラス名の参照箇所で F2 を押します。PowerShell Editor Services における既存の名前変更処理を、同一ファイル内のクラス参照と、オプションの Attribute サフィックスの動作を含めて追跡します。完了の条件は、名前変更によって宣言、コンストラクター、型参照、属性の使用箇所が一貫して更新されることです。