Added support for 1.21.4

Added options for crowbar:
- use-type - how you can use it (RIGHT_CLICK, LEFT_CLICK, BOTH)
- allow - what spawners can it remove (owned, natural, trusted, other)

Added spawner tags. Tags can be used to set a true or false values on a spawner that will change its behavior.
There are many tags:
- TICKING_DISABLE - disables spawner ticking
- SPAWNING_DISABLE - disables spawner spawning
- UPGRADES_DISABLE - disables upgrade opening
- UPGRADES_UPGRADE_DISABLE - disables upgrade purchasing
- UPGRADES_SWITCHING_DISABLE - disables spawner switching
- UPGRADES_CHARGES_DISABLE - disables charge purchasing
- CHARGES_USE_DISABLE - disables charge usage
- SPAWNABLE_USE_DISABLE - disables spawnable entity limit usage
- PLAYER_REQUIREMENT_DISABLE - disables requirement for a player nearby to spawn
- ONLINE_REQUIREMENT_DISABLE - disables owner online requirement to spawn
- NEARBY_LIMIT_REQUIREMENT_DISABLE - disables nearby entity checking to spawn
- CHUCK_LIMIT_REQUIREMENT_DISABLE - disables chunk entity checking to spawn
- WARNING_PARTICLES_DISABLE - disables warning particles
- HOLOGRAM_IDENTITY_DISABLE - disables identity (stack and name) hologram
- HOLOGRAM_WARNINGS_DISABLE - disables warning hologram
- HOLOGRAM_COUNTDOWN_DISABLE - disables countdown hologram

To apply tags use /sl modify tags [add/remove] [tag^] [state?]
There are 2 states:
- permanent - tag will be saved on the spawner, and on the item when broken.
- temporary - tag will not be saved on the spawner, and will be removed when the spawner gets unloaded or is removed.

Tags can be used to create ' admin' spawners that are for showcase only or has some options disabled to be used in a public place.

Added item parsing if you are had used SpawnerMeta before.
Fixed issues with player file saving.