Add NoBuild parameter to Add-Migration PMC command

[Copilot]

Add-Migration lacked a -NoBuild switch, unlike dotnet ef migrations add --no-build, leaving PMC users unable to skip the build step when the project is already up-to-date.

This is useful as a workaround for issues like #38572

Changes

• EntityFrameworkCore.psm1: Added [switch] $NoBuild parameter to Add-Migration; passes -skipBuild:$NoBuild to the internal EF helper to conditionally skip the solution build
• EntityFrameworkCore.PS2.psm1: Added $NoBuild to the PS2 stub's signature (stub always throws "upgrade PowerShell"; parameter presence prevents argument rejection)
• Updated .PARAMETER NoBuild help comment in both files

Usage

Add-Migration InitialCreate -NoBuild

[Copilot]

Pull request overview

Adds a -NoBuild switch to the EF Core Package Manager Console Add-Migration command so PMC users can skip the Visual Studio solution build step (similar in intent to dotnet ef ... --no-build), helping scenarios where rebuilding is unnecessary or problematic.

Changes:

• Added [switch] $NoBuild to Add-Migration in EntityFrameworkCore.psm1 and forwarded it to the internal EF helper via -skipBuild:$NoBuild.
• Added the same parameter to the PowerShell 2 stub (EntityFrameworkCore.PS2.psm1) so the command surface accepts it (even though the stub still throws).
• Updated parameter help text to document NoBuild.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/EFCore.Tools/tools/EntityFrameworkCore.psm1	Adds -NoBuild to Add-Migration and forwards it to the internal EF helper to conditionally skip the build step.
src/EFCore.Tools/tools/EntityFrameworkCore.PS2.psm1	Updates the PS2 stub signature/help to include -NoBuild to prevent argument rejection.

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