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

Start by reproducing the two class examples and pressing F2 on the class name references. Trace the existing rename handling in PowerShell Editor Services, including same-file class references and the optional Attribute suffix behavior. Done means renaming updates the declaration, constructor, type references, and attribute usage consistently.