Add spawn/ connect protection

[CitralFlo]

Is your feature request related to a problem? Please describe.
Players often get attacked immediately after logging back in from combat, making it unfair and frustrating.

Describe the solution you'd like
A brief period of invulnerability (e.g., 5-10 seconds) after rejoining the game following a combat logout, where players can't take damage. Protection should end if they attack, preventing abuse.

Describe alternatives you've considered
No protection, leaving players vulnerable.
Permanent safe zones, but this could be exploited.
Auto-teleporting players to a safe location upon rejoin.
Additional context
Admins should be able to configure the duration and where the protection applies (e.g., only in spawn zones).