fix: NPCs actually give items when asked

[scarf005]

Summary

SUMMARY: Bugfixes "NPCs actaully give items when asked"

Purpose of change

• fix NPC can't provide anything to help in form of items even with successful check  #1252
• fix "X has nothing to give!" commonly occurs when asking for items after accepting a mission, even when an NPC has items in inventory #2662

Describe the solution

• removed checks for debt entirely, as the player already passed the check.
• TALK_SHARE_EQUIPMENT was wrongly checking infected, fixed it to use asked_for_item instead.
• as that blocks repeated asking for items, added another dialogue option (with higher difficulty)
• made denying less rude, because that causes even friendly npc to swear at you

Describe alternatives you've considered

migrate entire dialogue system to Lua

Testing

2023-10-04_21-47-45.mp4

Additional context

[chaosvolt]

Errors seem unrelated, far as I can tell?

[olanti-p]

There's some weird behavior with persuasion chances.

1. Spawn random NPC
2. Ask to do something for them
3. Accept mission
4. Ask for equipment
5. Choose "Well, I'm helping you out..." with 100% chance
6. Get equipment
7. Ask for more equipment
8. Persuasion check shows 100%
9. NPC agrees and gives something
10. Goto step 7
11. Eventually NPC gives away all their inventory and has nothing to give anymore.

[scarf005]

not sure why but persuation seems to be bugged atm.