Update features

[FunnyBrother666]

1. Add a function of infinite zombie resurrection. This will be a little more interesting.
2. Adds a more user-friendly weapon selection interface Hud instead of pressing the number keys to select one by one.
   I would really appreciate it if you could implement these new features.

[Nicksf13]

Respawning for all rounds?
Adds a more user-friendly weapon selection interface Hud instead of pressing the number keys to select one by one.
I would really appreciate it if you could implement these new features. - Do you have an idea for any? I mean, i am not so good with HUDs

[FunnyBrother666]

Yes, in rounds, zombies can respawn after being shot. I hope this mode can infinitely approach CS1.6, like the Zombie Hero mode, with Terminators and Heroes. When only three humans are left, you can choose to become a hero, and zombies killed by heroes cannot respawn.

The HUD doesn't matter; gameplay is the most important. :)