Implement code generation for operators samples

[hawkw]

• [x] op1.decaf
• [x] op2.decaf
• [x] op3.decaf
• [x] op4.decaf
• [x] op5.decaf
• [x] op6.decaf
• [x] op7.decaf
• [x] op8.decaf
• [ ] op9.decaf
• [ ] op10.decaf
• [x] op11.decaf

[hawkw]

op9.decaf and op10.decaf contain invalid syntax (not supported by the parser) and will be skipped.