What has been done in this MR?

Set a Firemaking level to equip the 3 rewards from the activity. While currently there is no way to boost the skill, should Evil Dave and his stews come in it would be

other changes were from me changing the requirements in haste, before I knew they weren't getting checked here

What should testers check?

I have tested these changes thoroughly.
I used the relevant Zaros tool for any JSON edits where possible, and have attached screenshots of any changes.