feat(assetto_corsa): add new eggs with server manager

[fluffy-kaiju]

Description

Assetto Corsa Dedicated Server with Asseto Server Manager web interface to manage the server.

Checklist for all submissions

• [x] Have you followed the guidelines in our Contributing document?
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [x] Have you tested and reviewed your changes with confidence that everything works?
• [ ] Did you branch your changes and PR from that branch and not from your master branch?
  • If not, why?: I've made a fork, if is require to make the change in a other branch I will make a new PR

• [x] You verify that the start command applied does not use a shell script
  • [ ] If some script is needed then it is part of a current yolk or a PR to add one
• [x] The egg was exported from the panel

New egg Submissions

1. [ ] Does your submission pass tests (server is connectable)?
2. [ ] Does your egg use a custom docker image?
   • [ ] Have you tried to use a generic image?
   • [ ] Did you PR the necessary changes to make it work?
3. [ ] Have you added the egg to the main README.md and any other README files in subdirectories of the egg (e.g /game_eggs) according to the alphabetical order?
4. [x] Have you added a unique README.md for the egg you are adding according to the alphabetical order?
5. [x] You verify that the start command applied does not use a shell script
   • [ ] If some script is needed then it is part of a current yolk or a PR to add one
6. [x] The egg was exported from the panel

[fluffy-kaiju]

Hello, this is my first time submitting a PR for Pterodactyl eggs. If I've made any mistakes or if there's anything that needs improvement, please feel free to let me know! 😊

It's getting late on my end, so I'll continue working on this tomorrow.

Notes to my self

• [ ] Add on the README that Assetto Corsa Dedicated Server is free, so it's safer to use an alt account without 2FA
  • https://steamdb.info/app/302550/info/
• [ ] Add var to enable/disable monitoring (telemetry/prometheus endpoint)