Added MiniMessage support

[Tanguygab]

Support for MiniMessage in menu titles, item display names & lores.
Also made it so legacy colors would work alongside MM colors without issues.
Legacy colors will still work, but MM colors can't be used in the same strings.
Also copy-pasted ChatChat's papi:PLACEHOLDER TagResolver code to support PAPI placeholder returning legacy colors.

[BlitzOffline]

I have made a few changes.

• New per menu option use_mini_messages. Defaults to false. If enabled, menu titles, item names and item lore will use MiniMessages for formatting. Option only works on Paper servers.
• New <arg:ARGUMENT> argument for MiniMessages. It replaces the old . (may need to find a better name than arg). It also has an optional parameter of closing or inserting, the same way tag has. It defaults to closing.
• I made it so tag resolvers for PlaceholderAPI () and Arguments () work with menu title, item name and item lore (only when use_mini_messages is enabled) but always work for [minimessage] and [minibroadcast].
• %% placeholders and old arguments are no longer parsed for menu title, item name and item lore if use_mini_messages is enabled.
• %% placeholders and old arguments will never parse for [minimessage] and [minibroadcast] actions

[BlitzOffline]

I had a discussion with @Tanguygab and here is the update:

• allow %% placeholders and not just the <papi> tag.
• check if argument tags work inside placeholders and vice versa