[T6] Add a print when IPaks get loaded

[meowica]

Summary

I think it would be a nice addition to print when an IPak loads, similar to when Fast Files load.
It could be something like "Loading ipak "

Why?

It will allow you to see what IPaks get loaded, useful for both core and custom IPaks, similar to the "Loading fastfile" message

Proposed solution

Add a simple print that says "Loading ipak ", maybe within the IPak_AddPackFile function.

Affected game(s)

BO2 Multiplayer (T6MP), BO2 Zombies (T6ZM)

Affected component(s)

Client (game), Server (dedi)

Additional information

No response

[ineedbots]

r5244 is out and now includes sabls and ipak loading prints