Made A Few Changes :) I need this project for my placements so i contributed, could you please have a look and approve the pull request if you approve the changs?

[Snowyyxx]

Split it into logical modules (commands + shared server_types).

Added five real slash-commands for listing users, renaming, private messaging, color changes, and help.

Cleaned up a few minor C-API mishaps (headers, redundant zeroing).

Ensured all shared functions / globals use a single, matching declaration in server_types.h.