Fix: Brand message being sent too early

[onebeastchris]

Further:

• Fixes ServerPlayer.clientInformation().language() returns language string as uppercase instead of expected lowercase #5235
• Fixes Geyser is not sending the Client Brand name "Geyser" #5237

Main changes:

• Moves the Geyser SessionAdapter listener for MCPL into a separate class, and adds it after the default listener to ensure that MCPL's protocol state switching happens before Geyser translates anything
• Removes the (login) disconnect packet listeners in favor of the DisconnectedEvent - those translators wouldn't be useful as the default mcpl listener already handles them
• Geyser now changes the disconnect messages in an internal event subscriber, thereby allowing extension etc to see the original reason set by the Java server

[Budderman18]

Im having this message occur with some bedrock players which results in their brand being null: [Geyser-Spigot] Tried to send ServerboundCustomPayloadPacket packet while not in CONFIGURATION outbound state. Current state: LOGIN

[onebeastchris]

@Budderman18 Thanks; fixed that.