Add Control Flow: JUMP and Conditional Branches

Add control flow instructions to your stack-based VM in C.

Requirements:

• Add EQ, LT, GT, JUMP, and JUMP_IF_FALSE opcodes to the Opcode enum
• Implement EQ: pop two values, push 1 if equal else 0
• Implement LT: pop two values, push 1 if first < second else 0
• Implement GT: pop two values, push 1 if first > second else 0
• Implement JUMP: read a 2-byte address operand and set PC to it
• Implement JUMP_IF_FALSE: pop top value; if zero, jump to address
• Write a bytecode program that computes the sum of numbers 1 to 10 using a loop
• Write another bytecode program that demonstrates if/else: print whether a number is positive, negative, or zero
• Print the VM state (PC, stack) after each instruction during execution
• Show the loop and conditional branching working correctly

Test:

• Show JUMP instructions changing the PC
• Show conditional branching (EQ, LT, GT)
• Show a loop executing multiple times
• Show if/else logic selecting the correct path