Add new fields to the serverside itemlist

[RyanYappert]

Expands the serverside itemlist.csv to include:

• Item rank
• Subcategory
• English Name (primarily for debug purposes)
• Required level
• Allowable jobs
• Base crest slots
• Quality (stars)
• Allowable genders

Also makes the internal representation of that list a Dictionary keyed by UID, so it should be faster to look up items.

Checklist:

• [ ] The project compiles
• [ ] The PR targets develop branch