Task Rarity Introduction

Added task rarity concept in version 1.8.7+

New addition in config.yml:

# Task Rarity Refresh Probability
# Color is the recommended task name color setting, convenient for players to identify tasks
rarity:
# Normal task (white) &f
normal: 0.8
# Advanced task (blue) &1
advanced: 0.5
# Rare task (purple) &5
rare: 0.3
# Rarer task (pink) &d
rarer: 0.2
# Epic task (orange) &e
epic: 0.1
# Mythical task (gradient) &e&l
mythical: 0.01
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Rarity as above, default has these rarities

1. Daily randomly generated tasks will be generated according to probability based on above configuration, insufficient quantity filled with normal tasks (all historical tasks are normal)
2. Main purpose: Players wanting high rarity tasks must keep refreshing daily tasks, improving revenue
3. New task command changed to /plk create [task name] (task type) (task rarity)
4. Or use /plk setRarity [task id] [rarity] to set task rarity