[IMPROVEMENT] crosshair dissapear every time when you change weapons

Thats it

while I aiming is better for me maintain the crosshair always active.
can be added an option like `hiddecrosshair_whilechangeweapon on/off` ?
...or something 😂 (horrendous cvar name)
https://github.com/user-attachments/assets/a127d2dc-a232-410a-bab3-ec2030ddbb18