Stop prefixing interfaces with 'I' about altv-athena

[Stuyk]

As this may seem like a personal preference, the TypeScript handbook does not suggest prefixing interfaces with 'I'.
This convention is borrowed from the past and I believe this project shouldn't use it since:

• it is against encapsulation principles.
• Hungarian notation times are long gone.
• it is a bad naming convention.
• major TypeScript based frameworks and libraries discourage from this (Angular, lib.d.ts etc)

A more detailed discussion and reasons can be found here and here

Since this seems to be 'best practice' I'll revert everything to non-i interfaces when I get the time.

I think it's fine but if that's what the standard is then I guess I'll have to adapt.