Update 10.0 Preview 4 Release notes (#9867)

* Update winforms.md

First draft with copilit

* Review feedback

latest updates

* Update winforms.md

* Update release-notes/10.0/preview/preview4/winforms.md

Co-authored-by: Tanya Solyanik <tanyaso@microsoft.com>

* Update release-notes/10.0/preview/preview4/winforms.md

Co-authored-by: Tanya Solyanik <tanyaso@microsoft.com>

* Update release-notes/10.0/preview/preview4/winforms.md

Co-authored-by: Tanya Solyanik <tanyaso@microsoft.com>

* Update release-notes/10.0/preview/preview4/winforms.md

Co-authored-by: Tanya Solyanik <tanyaso@microsoft.com>

* Update release-notes/10.0/preview/preview4/winforms.md

Co-authored-by: Tanya Solyanik <tanyaso@microsoft.com>

---------

Co-authored-by: Tanya Solyanik <tanyaso@microsoft.com>

Author: merriemcgaw

release-notes/10.0/preview/preview4/winforms.md

@@ -2,13 +2,53 @@
 
 Here's a summary of what's new in Windows Forms in this preview release:
 
-- [Feature](#feature)
+* [Features and Enhancements](#features-and-enhancements)
+* [Bug Fixes](#bug-fixes)
+* [Infrastructure and Tooling](#infrastructure-and-tooling)
+* [Localization and Documentation](#localization-and-documentation)
 
 ## Windows Forms updates in .NET 10
 
-- [What's new in Windows Forms in .NET 10](https://learn.microsoft.com/dotnet/desktop/winforms/whats-new/net100) documentation.
-- [Issues List for Windows Forms in .NET 10 Preview 2](https://github.com/dotnet/winforms/issues?q=is%3Aissue%20milestone%3A%2210.0%20Preview2%22%20)
+* [What's new in Windows Forms in .NET 10](https://learn.microsoft.com/dotnet/desktop/winforms/whats-new/net100) documentation.
+* [Issues List for Windows Forms in .NET 10 Preview 4](https://github.com/dotnet/winforms/issues?q=is%3Aclosed+milestone%3A%2210.0+Preview4%22)
 
-## Feature
+---
 
-Something about the feature
+## Features and Enhancements
+
+**Shared Core Clipboard Functionality with WPF** -
+Introduced shared functionality with WPF by moving reusable code into a common library for better code maintainability.
+
+[Share System.Private.Windows.Core with WPF](https://github.com/dotnet/winforms/issues/12179).
+
+**Improved Test Coverage** -
+Numerous unit tests were added to improve reliability and ensure comprehensive coverage across components.
+[New Unit Tests](https://github.com/dotnet/winforms/issues?q=is%3Aclosed%20milestone%3A%2210.0%20Preview4%22%20label%3A%22area-test%20coverage%22)
+
+
+## Bug Fixes
+
+* [Fix a series of Analyzer issues.](https://github.com/dotnet/winforms/pull/13333)
+
+* [Fix #13305 Baseline SnapLines disappear in the derived ControlDesigners](https://github.com/dotnet/winforms/pull/13324)
+
+* [InvalidOperationException when dialog containing focused DataGridView is closed](https://github.com/dotnet/winforms/pull/13320) (Fixes #13319)
+
+* [Property grid entry for ShortCut keys should not be up/down scrollable](https://github.com/dotnet/winforms/pull/13280) (Fixes #13279)
+* [Ignore case for DESC and ASC in BindingSource.Sort](https://github.com/dotnet/winforms/pull/13283) (Fixes #13278)
+
+## Infrastructure and Tooling
+
+**Enhanced GitHub Workflow Automation** -
+Onboarded to a new issue-labeling system based on GitHub workflows to improve automation and self-service capabilities.
+[Onboard to the GitHub workflow-based issue-labeler](https://github.com/dotnet/winforms/pull/13101).
+
+## Localization and Documentation
+
+**Translation Updates** -
+Reviewed and corrected translations, including fixing the French translation of "(none)."
+[Correct translation for "(none)" in French](https://github.com/dotnet/winforms/pull/13162).
+
+---
+
+For the full list of updates, visit the **[10.0 Preview 4 milestone](https://github.com/dotnet/winforms/issues?q=is%3Aclosed+milestone%3A%2210.0+Preview4%22).**