Implement Event Storage NPCs + Era Module

[KiplingFFXI]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

This PR implements storage functionality for the 5 event storage NPCs added to the game in the October 11, 2005 version update. It also takes into account modern retail features related to race changes. Finally, this PR also corrects a few content tagsm adds needed item enums, and implements an era module since the cost of this service was lowered in the December 9, 2008 version update.

Steps to test these changes

Give yourself one of the qualifying storage items, such as a Moogle Cap. Trade it to any of the 5 NPCs. See they take it, give you the appropriate char var, and deduct gil from you when you withdraw it. See that if you store an RSE item and race change, that item is converted to your current race when you pick it up, per retail.

Captures

Event Storage NPCs.zip