kernel/svc: Implement InitialProcessIdRange and improve process exit handling

- Replace stubbed InitialProcessIdRange implementation with proper bounds (1-0x50)
- Add handle and info_sub_id validation for InitialProcessIdRange
- Replace process exit ASSERT with graceful error handling and logging
- Add try-catch block around system.Exit() for safer shutdown
- Add atomic header inclusion for binder.h

This improves system call reliability by properly implementing process ID
range checks and adding safer process exit handling with proper error logging.

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