Add Wayland-compatible AppStore runtime

[vicliu624]

Summary

• add a wrapper that selects Wayland/SDL or framebuffer runtime based on the current display environment
• add Wayland build output alongside the existing framebuffer runtime
• add Zero desktop metadata for Wayland task matching
• keep the framebuffer path available for the legacy launcher
• improve install/uninstall behavior in the Zero runtime without changing the AppStore UI contract

Validation

• deployed and exercised on pi@192.168.50.35
• verified the AppStore can run in the Zero labwc session without OS-specific window rules
• verified package install/uninstall flow shows the system authorization prompt and updates APPLaunch desktop entries