Create owners.json for iitpp-roblox scope

Adds the following accounts as owners for the [`iitpp-roblox`](https://github.com/IITPP-Roblox/) scope: - [TheNexusAvenger (13441476)](https://github.com/TheNexusAvenger/) - [AnimeRiceFarm (109144494)](https://github.com/AnimeRiceFarm/) - [frqstbite (40967034)](https://github.com/frqstbite/) - [GGshor (73340248)](https://github.com/GGshor/)