feat: Allow setting individual experience rates

[Nyeriah]

• Implement a command to allow players to choose their experience rates
• Implement a setting to specify the max allowed rates they may set
• Implement a setting to enable the event permanently for debugging purposes
• Implemented setting to restrict bonus to quests only
• Lots of refactoring and code improvements

[Annamaria-CC]

Tested: No work -> changing .weekendxp rate 1 to .weekendxp rate 2 did not effect killing creatures. It only affected quests.

Suggestion: Let the command .weekendxp rate show the maximum rate people can select if possible.

# XPWeekend.Announce
# 	Annnounces to the player that the module is enabled even if its not the weekend.
# default: 1 = true 
#

XPWeekend.Announce = 0

# XPWeekend.Enabled
#	Enable or Disable the module.
#default: 1 = enable
#

XPWeekend.Enabled = 1

# XPWeekend.xpAmount
#	Allows the config file to set the amount of times xp is given
# default = 2 (double)
#
XPWeekend.xpAmount = 2

# XPWeekend.IndividualXPEnabled
#     Allows players to set their own XP rates during the weekend through the weekendxp rates command.
#     Default: 0 (Disabled)

XPWeekend.IndividualXPEnabled = 1

# XPWeekend.MaxAllowedRate
#     Max allowed rates players may set while using the weekendxp rates command.
#     Default: 2
#

XPWeekend.MaxAllowedRate = 2

# XPWeekend.AlwaysEnabled
#     Forces the weekend xp bonus event to always be enabled regardless of the day. Use this for debugging.
#     Default: 0 (Disabled)
#

XPWeekend.AlwaysEnabled = 1

# XPWeekend.QuestOnly
#     Restricts the experience bonus to quest rewards only.
#     Default: 0 (Disabled, both creatures and quests are affected)
#

XPWeekend.QuestOnly = 0