Add proper documentation for normal identities


At the moment, there’s no actual documentation for normal identities on the current version of the developer hub. This is annoying as error codes generated by Roblox that make reference to these identities, and they’ve been changed at some point away from what they were when documentation (this is outdated) existed. This has lead to some confusion rather recently as to what identity plugins run at.

To combat this in the future, it would be cool if normal identities were documented on the developer hub. This would hopefully include a list of what sources ran at what identity and what restrictions, if any, were on each identity (what security tags they could access, any restricted Instances, etc.).

EDIT: I’ve done some digging and it turns out the error message that’s displayed is about as unhelpful as it could be without being an error occurred. The permission number is entirely disconnected from the actual identity necessary to access the member and generally speaking it’s a mess. This makes it abundantly clear we need official documentation for this.