feat: Add console CLI

[Zffu]

Add a console CLI for standalone sever executables that allows to run commands.

Console commands:

• /players: List the connected player instances
• /disconnect : Disconnect the given player
• /ver: Dumps all of the version info of the server implementation
• /cload : Loads a given chunk
• /cunload : Unloads a given chunk
• /stop: Stops the server
• /dumpentities: Dumps all of the loaded entities
• /dumpchunks: Dumps all of the loaded chunks

Dev-mode commands:

• /dfeatincl : Enables a given feature flag for this instance
• /dfeatrem : Disables a given feature flag for this instance
• /dfeats: Lists every flag-based feature id
• /dperf: Shows the given performance stats of the server (time per tick, how much time spent per tick on certain taskw eg: chunk loading)