Add support for servers with prestrafe sourcemod plugin

[zer0k-z]

Using data sent by the game server, you can fetch a lot more information about the player than API queries.

While this require a plugin to be installed on the server side, it isn't limited by the GlobalAPI query limit.

Current features:

• Globalcheck (for real now)
• Server information (only names and global status for now)
• Current run information (map name, course, checkpoints, teleports, time elapsed)

Planned features:

• Server jumpstats (GOKZ jumpstats aren't global, so this would be a better temporary solution) and maybe more related data (eg. server records, could be useful for non global maps)
• More Stats integration for even more statistics

The migration from GitLab seems to break the entire sourcemod branch in prestrafe repository, so I just create a new branch from the master branch in my fork instead.