[fix] AH Announcements, AH timer issue

[sruon]

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• 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?

2 for 1

• Reworks ah_announcement module to defer the bulk of the logic to auctionutils, so it stops breaking every other day. Closes 🐛 AH announcements module not letting purchases proceed #7485

  • auctionutils::PurchasingItems returns a boolean, indicating if a sale went through

• Fixes the check for user throttling when they check list of sales, as it is currently defaulting to the "Try again later" state

  • Since m_AHHistoryTimestamp is initialized to timer::time_point::min() (min value of a long long), the existing check no longer works.

Steps to test these changes

Without modules enabled:

• Open Auction House
• Check Sales Status
• Ensure items for sale show up
• Try again during the 5s cooldown, ensure "Please try again" shows up
• Ensure items can be listed and purchased

With modules enabled:

• Ensure pagination on Sales Status works, along with the 1.5s cooldown
• Ensure a message is received when purchasing one of your own item

[cocosolos]

Oh good catch. Could also use std::chrono::abs() I think. Intuitively -5s duration is still a 5s duration but I guess you need to explicitly check that.

Edit: or curTick > PChar->m_AHHistoryTimestamp + 5s should work too. I looked over the rest of the uses of time_point::min() and it looks like everything else should be okay.

[sruon]

Made the change based on your recommendation since that's easier to read and understand.