LibJS/JIT: Compile the TypeofLocal bytecode instruction

Author: https://github.com/awesomekling
Commit: 17b2c7d965
Pull-request: https://github.com/SerenityOS/serenity/pull/21619
Reviewed-by: https://github.com/Hendiadyoin1

Userland/Libraries/LibJS/Bytecode/Op.h

@@ -1447,6 +1447,8 @@ public:
     ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
     DeprecatedString to_deprecated_string_impl(Bytecode::Executable const&) const;
 
+    size_t index() const { return m_index; }
+
 private:
     size_t m_index;
 };