* Added chat message when an item is picked up
* Changed InventoryUpdateEvent::Collected to InventoryUpdateEvent::Collected(Item) to facilitate the client being aware of what was picked up
* Added SfxInventoryEvent enum to allow different sounds to be used based on the item type. The RON mapping/de-serialization doesn't support matching on structs so we have to give it fixed enum values which are determined in TryFrom<&InventoryUpdateEvent> for SfxEvent
* Refactored InventoryManip::Pickup arm of match in inventory_manip::handle_inventory for clarity/better warning messages
* Fixed a bug that prevented the CollectFailed event from being raised when a player's inventory is full
* Added a panic for the situation where an item is pushed into the players inventory and then the deletion of the entity fails as this would indicate an item dupe bug - this could potentially be reworked to pull the item back from the player's inventory but this seems like there's be a more correct transactional way to do this.
* Added two temporary sounds to prove the per-item sound functionality (pickup sounds for Swords and Staffs)
- Completely removed both `log` and `pretty_env_logger` and replaced
with `tracing` and `tracing_subscriber` where necessary.
- Converted all `log::info!(...)` et al. statements to just use the
shorthand macro i.e. `info!`. This was mostly to make renaming easier.
