Simplify the csproj and remove the wapproj

[0x5bfa]

Description

• Remove the WAP project
• Remove unnecessary <Content/> definitions

Important

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Motivation and Context

Simplification of build-and-deploy

How Has This Been Tested?

• Build the app
• Check if images/ddsample codes are all present in the app

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[Copilot]

Pull request overview

Simplifies the build configuration by removing the WAP packaging project (and its associated WinUIGallery.DesktopWap.slnx) and replacing the long hand-maintained list of <Content Include="...">/<None Remove="..."> entries in WinUIGallery.csproj with concise wildcard includes. The main solution WinUIGallery.slnx is reorganized to host the src and global folders that previously lived in the WAP solution.

Changes:

• Delete WinUIGallery/WinUIGallery.DesktopWap.Package.wapproj and the WinUIGallery.DesktopWap.slnx solution.
• Collapse the per-file <Content> / <None Remove> / <Page Update> lists in WinUIGallery.csproj to a few wildcards (Assets\**\*.png, Samples\SampleCode\**\*.txt, plus the two JSON data files) and drop the now-unused SingleProject conditional branches.
• Move WinUIGallery.SourceGenerator and WinUIGallery projects into a new /src/ folder in WinUIGallery.slnx.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
WinUIGallery/WinUIGallery.DesktopWap.Package.wapproj	Removed legacy WAP packaging project.
WinUIGallery/WinUIGallery.csproj	Heavy cleanup: drops SingleProject branches and replaces explicit asset/sample lists with wildcard Content includes.
WinUIGallery.slnx	Adds /src/ folder containing the main app and source generator projects (previously top-level).
WinUIGallery.DesktopWap.slnx	Removed alongside the WAP project.

[marcelwgn]

Thanks for doing this but next time please file an issue before doing this, especially if its about highly opinionated things like project (infra)structure.

[marcelwgn]

Keep this as Solution Items.

[marcelwgn]

WinUI Gallery and the source generator should remain top level in my opinion.

[0x5bfa]

Since I have a few questions, I've opened an issue.