Adding the proper way to do resource precache

[Yarukon]

(edit: tested on linux)

from CS2Fixes

example:

RegisterListener<Listeners.OnServerPrecacheResources>((manifest) =>
{
    manifest.AddResource("path/to/model");
    manifest.AddResource("path/to/material");
    manifest.AddResource("path/to/sound");
});

warning: this will only be called when initial startup / changing map

improvement: maybe find a better way to do the event

[KillStr3aK]

LGTM, and finally!

[roflmuffin]

@KillStr3aK Have you tried this on Linux or would you like me to

[KillStr3aK]

@KillStr3aK Have you tried this on Linux or would you like me to

I would like you to do so

[Yarukon]

@roflmuffin i've tested on linux and it works fine