feat: Prefer loading projects with *.sdpkg above other executables

[Eideren]

PR Details

Users may have other unrelated executable in their solution, this PR ensures that the gamestudio will prefer projects with an existing sdpkg over others when selecting the current project.

Related Issue

None logged

Types of changes

• Docs change / refactoring / dependency upgrade
• 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)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built and run the editor to try this change out.