Jobs integration cleanup & fixes

[tal5]

Changes

• Moved all of the Warnings to JobsBridge, just to have them all in once place for easier bumping in the future.
• Changed the Warning's field names to match their IDs, just a standard used in core/Denizen.
• Updated jobs (tag base) to the ListTag convertor constructor.
• Cleaned up the jobs_job constructor tag's handling to use JobsJobTag as the param type instead of handling it manually.
• Moved JobsCommand registration to be with the rest of the registrations instead of at the bottom.
• Updated JobsCommand to modern command handling (with legacy handling for out-of-order args).
• Minor meta correction in JobsCommand, new line after dot.
• Added tab-complete for the job names in JobsCommand.
• JobsCommand now uses the methods on PlayerManager instead of the ones on JobsPlayer, as these are the ones that handle saving the changes and all (reported on Discord).
• Updated JobsCommand to the modern switch syntax.
• Gave all jobs event a general update (modern determinations, switch syntax, meta, and using tryArgObject for JobsJobTag matching).
• Corrected the UUID in JobsJobTag's meta example (it was meant to be mcmonkey's UUID, but the wrong mcmonkey was used. This is a very big problem).
• Implemented advancedMatches and added Matchable meta to JobsJobTag.
• Improved JobsJobTag#valueOf's handling of the player UUID input - It now parses it as just a UUID instead of a PlayerTag, mainly as stuff like PlayerName,job shouldn't be allowed.
  Also changed the checking of whether the player is valid to trying to get it from jobs + a null check, instead of PlayerTag#isValid.
• Improved the handling for the job name input to now give a proper error and return null instead of throwing an NPE for invalid names.
• Added a starts with prefix -> true into JobsJobTag#matches, before doing a valueOf != null.
• Changed JobsJobTag#get/setOwner to use a UUID instead of a PlayerTag.
• Did a bit of method re-ordering in JobsJobTag, to have less relevant methods such as get/setPrefix at the bottom and stuff like register higher up.
• Marked ElementTags as plain-text where relevant.
• Changed JobsJobTag.xp/max_xp (tag) to use early return.
• Changed JobsJobTag.level to use a ternary operator.
• Updated JobsJobTag.xp (mechanism) to modern mech registration.
• Marked JobsJobTag.tagProcessor as final.
• Implemented JobsJobTag#debuggable.
• Updated JobsPlayerProperties to a modern JobsPlayerExtensions extension class.
• Replaced places that got a jobs player by name with getting it by UUID.
• Removed the registerPropertyTagHandlers call in JobsJobTag#register, as it doesn't look like it has any properties?
• Removed the weird contains("@") -> null check in JobsJobTag#valueOf, which seems like it was a mistake or something? don't see a reason to have that, but correct me if I'm wrong.
• Changed JobsJobTag#identify to use the new JobsJobTag#identify(prefix, separator) method.

Additions

• jobsSingleLineDescription deprecation warning for JobsJobTag.description, as it was deprecated but didn't have a proper warning.
• JobsJobTag#identify(String prefix, String separator) - used by identify and debuggable to avoid duplicate logic.

[mcmonkey4eva]

lol