v0.12.0 - VM Panic Handler

🚨 VM Panic Handler System

This release adds a comprehensive panic handler system for debugging and diagnostics.

✨ New Features

• vm_panic() API: Automatic error diagnostics with stack trace
• Panic Information Structures: (C) and (C++)
• Comprehensive Diagnostic Output:
  • Error code with human-readable message
  • Program Counter (PC) value
  • Data Stack depth and top 2 elements (TOS, NOS)
  • Return Stack depth with call trace (up to 16 entries)

🔧 Implementation Details

• All error paths in VM core integrated with panic handler
• Stack operations (push/pop) automatically log on overflow/underflow
• Opcode errors (div-by-zero, invalid jumps, etc.) logged automatically
• 5 comprehensive test cases covering all panic scenarios

📊 Size Impact

• Library size increase: ~2KB (182KB stripped with LTO)
• Minimal impact in final applications due to LTO optimization
• Unused panic code eliminated at link time

🧪 Testing

All 11 tests passing, including 5 new panic handler tests.

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Full Changelog: v0.11.1...v0.12.0