[TF2][Feature Request] Make "custom projectile model" work on all projectiles

[Brain-dawg]

CTFWeaponBaseGun::FirePipeBomb is currently the only function that supports the "custom projectile model" attribute. To the best of my knowledge, the code responsible for this could very easily be added to FireRocket, FireFlare, etc.

[Flpstrike]

It seems like something tottaly possible, but they seem to ignore stuff like this that many people want:

Unique Rockets: https://steamcommunity.com/sharedfiles/filedetails/?id=2613358776&searchtext