Moved Code Success!

[tristanpoland]

This pull request includes several changes to the stars_beyond and player_lib backends, as well as the server module. The changes introduce new dependencies, update function implementations, and reorganize code for better modularity.

Dependency Updates:

• Added serde_json to backends/stars_beyond/Cargo.toml and plugins/player_lib/Cargo.toml. [1] [2]
• Added serde and uuid to plugins/player_lib/Cargo.toml.

Code Reorganization:

• Renamed and moved server/src/server/in_world/mod.rs to plugins/player_lib/src/world.rs.
• Removed unused import plugin_api::* from server/src/server/mod.rs.

Function Implementation Updates:

• Updated player_joined function in backends/stars_beyond/src/lib.rs to include new event handling logic using serde_json and world::Object.
• Modified setup_listeners function to accept a reference to SocketRef.

Miscellaneous:

• Added pub mod world to plugins/player_lib/src/lib.rs.
• Simplified import statement in server/src/server/mod.rs.