Spectator mode is not working

[patyhank]

Describe the bug

In spectator mode
Because AbilityLayer.Type.SPECTATOR has never been added to the UpdateAbilitiesPacket
so you can't fly and noclip with the default Abilities

To Reproduce

1. /gamemode spectator
2. Move to the inside of the block
3. Player will keep falling down

Expected behaviour

Player will not keep falling

Screenshots / Videos

Youtube Reproduce: https://youtu.be/2HEQNU90WNU
Patched Workaround: https://youtu.be/rKMsBt_F9uo

Server Version and Plugins

No response

Geyser Dump

No response

Geyser Version

2.1.0-SNAPSHOT (git-master-870a838)

Minecraft: Bedrock Edition Device/Version

1.19.81

Additional Context

A simple workaround

Geyser/core/src/main/java/org/geysermc/geyser/session/GeyserSession.java

Line 1742 in 870a838

abilityLayer.setLayerType(AbilityLayer.Type.BASE);

to

        if (spectator) {
            abilityLayer.setLayerType(AbilityLayer.Type.SPECTATOR);
        } else {
            abilityLayer.setLayerType(AbilityLayer.Type.BASE);
        }

[Camotoy]

PRs are more than welcome!