feat: support serverAuth, imagePullSecrets and podLabels

[MagicAbdel]

Hi there,

This PR introduces some configuration enhancements to the Helm chart:

• imagePullSecrets: Allows the deployment to pull images from private container registries.
• podLabels: Provides the ability to inject custom labels for better resource tracking / service mesh integration / Workload Identity.
• serverAuth: Adds user-level configuration for server authentication.

These changes provide more flexibility for custom environments and security requirements

[levkk]

Amazing, thank you!