Upgrade Microsoft.Windows.CsWin32 to 0.3.209 in CLI project

[Copilot]

This PR updates the cswin32 package declaration to the requested version in microsoft/winget-create, keeping scope limited to dependency upgrade work. No additional interop input or generated source updates were required in-repo for this change.

• Dependency update

  • Bumped Microsoft.Windows.CsWin32 in src/WingetCreateCLI/WingetCreateCLI.csproj from 0.3.183 to 0.3.209.

• Scope and compatibility

  • Change is isolated to the CLI project package reference.
  • Existing CsWin32 usage surface (PInvoke credential APIs in TokenHelper) remains unchanged.

<PackageReference Include="Microsoft.Windows.CsWin32" Version="0.3.209">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>

Original prompt

Upgrade the cswin32 dependency in microsoft/winget-create to version 0.3.209.

Requirements:

• Update the relevant dependency declaration(s) for cswin32 to 0.3.209.
• Make any necessary code, generated code, or project configuration changes required for the repository to build and test successfully with the new version.
• Run or account for any repository-specific regeneration steps if cswin32 is used for source generation or generated interop code.
• Keep the change scoped to this upgrade.
• Create a pull request with a concise description of what changed and any compatibility considerations.

The following is the prior conversation context from the user's chat exploration (may be truncated):

User: Make a PR upgrading cswin32 to 0.3.209

Assistant: I’m waiting on your response to the confirmation dialog before I can continue creating the PR.

This pull request was created from Copilot chat.

[florelis]

The whole repo should move to use Central Package Management with a Directory.Packages.props