Implement user friendly uninstallation procedure

[Adrodoc]

Depends on #3

• Running function minect:uninstall should ask the user whether to uninstall everything or remove some connections.
• Maybe also add an option to remove a single connection, for example like this: /execute as @e[tag=minect_connection_dap] run function minect:remove or maybe via a wizard that show all known connections.
• Uninstall should also unforceload the connection chunks.
• There should be a disconnect method on MinecraftConnection that also deletes the connection files on disk.
• There should be a uninstall method on MinecraftConnection that also deletes the connection files on disk.