I've been wondering if it is possible to hire / create a company with
someone who would open a restaurant in my place and manage it
according to my guidelines.
Yes, of course. You can do it just like you described: Create a company, hire employees, (let them) open the restaurant.
You, as the owner of the company, could set up whatever guidelines you have in mind, and your employees would be bound by them (limited only by general laws, such as on health and safety).
Some caveats, however:
- You will need money to set this up - for buying / renting space for the restaurant, for paying your employees, obtaining supplies, initial marketing etc. It may take a while until the restaurant earns money (if ever), and you'll need money in the mean time.
- Someone will need to manage, that is make decisions. You can do that yourself, but then you will work for the restaurant (which you write you do not want to do). Or you can hire someone to do it for you, but that will cost more (in salary), plus you will have to find someone you can trust. That's a tradeoff for you to make.
I guess it'd be like an intellectual property.
That depends, but usually there will be little in terms of intellectual property.
If you have a unique idea for the restaurant, you could patent it, but there are many restrictions on what you can protect, and ways around it, plus this also costs money (a lot if you need a lawyer's advice).
Apart from that, you can register a trademark for the restaurant, but that only protects the name / logo, not any ideas.
Finally, some of your ideas might be considered trade secrets, but again the protection is limited.
In general, there is no blanket "idea protection". If you have a good idea for a restaurant, in most cases other restaurants will be able to copy them, possibly with slight changes - take that into account.