Add shortCut copy paste In DemoConsole

[Epica3055]

Fixes #10466

Root cause

Copy and paste now works in DemoConsole in netframework481 but not in net10. that's because the serializer here does not work in net10, it was deprecated long time ago.

https://github.com/dotnet/winforms/blob/b0b0e101cb69db4b70f7e3559e30406b210b1f1d/src/System.Windows.Forms.Design/src/System/Windows/Forms/Design/CommandSet.cs#L1409C1-L1415C74

Proposed changes

• We don't serialize CodeDomSerializationStore anymore. Copy the selectionComponents when CopyCommand is triggered.

Screenshots

Before

N/A

After

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 6.66667% with 14 lines in your changes missing coverage. Please review.

Project coverage is 76.60777%. Comparing base (1c091ca) to head (c798cbc).
Report is 24 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #13644         +/-   ##
===================================================
+ Coverage   76.57432%   76.60777%   +0.03345%     
===================================================
  Files           3252        3253          +1     
  Lines         640942      640965         +23     
  Branches       47437       47432          -5     
===================================================
+ Hits          490797      491029        +232     
+ Misses        146602      146280        -322     
- Partials        3543        3656        +113     

Flag	Coverage Δ
Debug	76.60777% <6.66667%> (+0.03345%)	⬆️
integration	18.97179% <6.66667%> (+0.49589%)	⬆️
production	51.06257% <6.66667%> (+0.06550%)	⬆️
test	97.41186% <ø> (+0.00048%)	⬆️
unit	48.44734% <0.00000%> (+0.03625%)	⬆️

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[Copilot]

Pull Request Overview

This PR refactors the form designer’s copy/paste commands to stop using BinaryFormatter serialization and instead keep a reference to the selected components for direct duplication.

• Introduces a private _toBeCopiedComponents field to store copied items.
• Replaces clipboard‐based serialization in OnMenuCopy/OnMenuPaste with DesignerUtils.CopyDragObjects.
• Simplifies status checks and removes obsolete BinaryFormatter code.

Comments suppressed due to low confidence (1)

src/System.Windows.Forms.Design/src/System/Windows/Forms/Design/CommandSet.cs:1844

• [nitpick] The loop index variable i is quite generic; consider renaming it to index to improve readability and make its purpose clearer.

                    int i = 0;

[Copilot]

This enables the Paste command even when there are no components to paste. Change the check to _toBeCopiedComponents?.Count > 0 so the command is only enabled when items are available.

Suggested change

	cmd.Enabled = _toBeCopiedComponents is not null;
	cmd.Enabled = _toBeCopiedComponents?.Count > 0;

[LeafShi1]

Please add Root Cause in the Description

By mistake