Bukkit

Minor update release
- Moved plugin to 1.21.9 (this version had had extra testing on 1.21.7 - 1.21.10)
- Added support for Folia servers
- Colour parsing has been overhauled, now supports all colour formats at the same time
- Added missing default field for dropdown in floodgate forms
- [delay] tag has been added.
- Session logic between panels has been simplified and other optimisations have been made
- Cooldown between opening panels has been added (configurable in config.yml)
- There is no longer a requirement for a minimum of one item to be in inventory panels

Important note when updating
- `[refresh] number` no longer works, use the new [delay] tag instead to delay your refresh