Upgrade projects to target .NET 10, add conditional System.Linq.Async dependencies for compatibility with earlier frameworks, and update project files for consistency across the solution.

[sfmskywalker]

Fixes #7057

This change is 

[Copilot]

Pull Request Overview

This pull request upgrades the Elsa Workflows project to target .NET 10 as the primary framework, adds conditional System.Linq.Async package references for earlier frameworks, and consolidates project configurations by removing redundant TargetFramework declarations in favor of inheritance from Directory.Build.props files.

Key Changes:

• Upgraded target frameworks from net9.0 to net10.0 across apps and test projects, and added net10.0 to multi-targeting in source modules
• Introduced conditional System.Linq.Async package references that exclude .NET 10, based on a claim of native async LINQ support
• Refactored test project files to inherit TargetFramework from parent Directory.Build.props for consistency

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Directory.Build.props	Added net10.0 to the multi-targeting frameworks list alongside net8.0 and net9.0
src/apps/Directory.Build.props	Changed single target framework from net9.0 to net10.0 for application projects
test/Directory.Build.props	Updated test projects' target framework from net9.0 to net10.0
test/performance/Directory.Build.props	Added import statement to inherit from parent Directory.Build.props and removed redundant whitespace
test/performance/Elsa.Workflows.PerformanceTests/Elsa.Workflows.PerformanceTests.csproj	Removed explicit TargetFramework declaration to inherit from parent Directory.Build.props
test/integration/Elsa.Resilience.IntegrationTests/Elsa.Resilience.IntegrationTests.csproj	Removed explicit TargetFramework declaration to inherit from parent Directory.Build.props
test/integration/Elsa.JavaScript.IntegrationTests/Elsa.JavaScript.IntegrationTests.csproj	Removed explicit TargetFramework declaration to inherit from parent Directory.Build.props
test/integration/Elsa.Activities.IntegrationTests/Elsa.Activities.IntegrationTests.csproj	Removed explicit TargetFramework declaration to inherit from parent Directory.Build.props
test/component/Elsa.Workflows.ComponentTests/Elsa.Workflows.ComponentTests.csproj	Removed explicit TargetFramework declaration to inherit from parent Directory.Build.props
src/modules/Elsa.Workflows.Core/Elsa.Workflows.Core.csproj	Added conditional System.Linq.Async package reference that excludes net10.0 with comment about native async LINQ support
src/modules/Elsa.Expressions.JavaScript/Elsa.Expressions.JavaScript.csproj	Added conditional System.Linq.Async package reference that excludes net10.0 with comment about native async LINQ support

[lukhipolito-nexxbiz]

Nice!