0.10.0

Spell Hotbar can be controlled via Keybindings! - Multiple hotkey behaviors available (hold to cast, press to cast), configurable for different casting mechanics separately - Custom hotkeys can be assigned - Vanilla hotkeys (such as use key, item hotbar keys) can be used, when no custom hotkeys are assigned - Switching between item and spell hotbar is no longer needed, nor possible - Spell Hotbar keybind is rendered on HUD

Other changes: - Spell Haste effects spell casting animation playback speed - Spell data files can now specify if Spell Haste should affect cooldown and casting speed - Internal refactor for the entire spell casting mechanism - Spell casting no longer stutters when quick switching between spells - Optimise spell projectile sync payload - Fix server config player_relations being reset on every launch