Docs: Add deployment documentation

[JacobCoffee]

Summary

Create documentation around deployment of Litestar applications.

This would include deployment via

• Manually via uvicorn, hypercorn, daphne, granian, etc.
  • docs: manual deployment with asgi servers #2663
• gunicorn with uvicorn workers
• Baremetal/VM with something like systemd unit files
• Via supervisor
• Containers/LXC
• K8s
• Behind a proxy (NGINX/Traefik/HaProxy/etc)
  • nginx-unit (Done in docs: add deployment section for nginx-unit #2615)
• Deployment through various cloud providers

Any other deployment mechanism that may be beneficial.

It should probably go in the Topics section

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[JacobCoffee]

This can be done in steps by many people. If you know how to deploy with systemd unit files, then right just that section, or if you know how to deploy in a HA setup with k8s write for that, and so on. We can add on in pieces.

[provinzkraut]

It should probably go in Usage section documentation, or topics.

It should go into "Topics"; That's what this section was originally intended for.

[JacobCoffee]

Inspiration from various good resources:

• https://flask.palletsprojects.com/en/3.0.x/deploying/
• https://fastapi.tiangolo.com/deployment/
• https://docs.djangoproject.com/en/4.2/howto/deployment/