Implement part of codegen and fix some frontend issues
Add asmjit to emit native code and add zydis to disassemble native code
Can successfully run some simple cases
Add more return value checks and set lass error
Implement exception throw and add operand stack overflow check
Remove lower_fe pass
Use cc->cmp_reg for cmp/branch IRs
Fix jit dump issues
Fix some compile warnings
Add part of codegen framework
Remove some unused JIT IRs
