Reforge rare item: fix maximum affix count generation

[raphaelrieuhelft]

Currently, using chaos on a jewel always generates four modifiers, which is clearly incorrect.

I've also tried to look into more precise weights for mod counts, here are the values I ended up using:

• non-jewels have 8/12 to roll 4 mods, 3/12 to roll 5, 1/12 to roll 6 (my source is this reddit comment: https://www.reddit.com/r/pathofexile/comments/ex2c5o/data_number_of_mods_acquired_from_rerolling_an/fg6aq67/)
• jewels have 65% to roll 3 mods and 35% to roll 4 (speculated in a bunch of places but I have not found a reliable-seeming source)

I've also looked into the code of the craftofexile simulator and it seems to use the same values.

[doomeer]

Thank you, that's a great contribution! I need to test a bit before merging but it looks good to me (aside from the small comment above).

[raphaelrieuhelft]

Oh no. Good catch!