Launch SkullbonezCore runtime

Launch SkullbonezCore exe with correct working directory preservation

Windows/PowerShell development workflow where asset paths are relative to repo root.

• · repo root path
• · optional: renderer flags, scene path, vsync setting

• · running process with preserved working directory for asset resolution

• · PowerShell Start-Process
• · SkullbonezCore.exe

SKULLBONEZ_CORE.exe built in Profile/ subdirectory; working directory == repo root

• · exe missing (build first with tools/validate_build.bat)
• · working directory not set == asset resolution fails

• · working directory preservation pattern
• · PassThru process handle return
• · build-first guardrail