LibJS/JIT: Compile the TypeofVariable bytecode instruction

Author: https://github.com/awesomekling
Commit: e946440ed3
Pull-request: https://github.com/SerenityOS/serenity/pull/21619
Reviewed-by: https://github.com/Hendiadyoin1

Userland/Libraries/LibJS/JIT/Compiler.h

@@ -69,6 +69,7 @@ private:
     void compile_put_by_id(Bytecode::Op::PutById const&);
 
     void compile_call(Bytecode::Op::Call const&);
+    void compile_typeof_variable(Bytecode::Op::TypeofVariable const&);
 
     void store_vm_register(Bytecode::Register, Assembler::Reg);
     void load_vm_register(Assembler::Reg, Bytecode::Register);