Content location enhancement

[Xevrac]

Is your feature request related to a problem? Please describe.
A source server might be an ideal location for a server, but not content fetching. A network might not be designed to handle download operations however is suitable for network traffic on a server. Using a CDN or S3 bucket would be more efficient in most cases for users requesting modded content on servers.

Describe the solution you'd like
BeamMP should look at allowing content to be stored in a remote storage location. This could be using S3, B2 or other CDN storage technologies. By default, the server looks for the content in its own directory unless otherwise specified.

Describe alternatives you've considered
Storing mods with the server on a larger instance is always the obvious practicality; as is a larger network pipe. But for others without this ability, having remote storage as an option would boost the player's experience as the download times would be significantly faster.