Feature: Wotlk classic like arena point calculation as option

[balleny]

Describe your feature request or suggestion in detail

adding wotlk classic arena point calculation as config option

Describe a possible solution to your feature or suggestion in detail

several arena point calculation changes happened broughout tbc classic resulting in the system implemented in s4 which stayed valid for s5 to s8 and follows the approach of making arena gear more accessible to enable balanced competition

https://www.reddit.com/r/classicwow/comments/us1cg5/tbc_arena_calculator_formula_updated_for_s4/
https://tbc.wow-tools.com/tbc_arena_calculator
https://arena.safetybelt.dev
https://www.curseforge.com/wow/addons/final-arena-calculator

Additional context

The NEWEST system being used in S4:
IF Rating >=150 (Could be 100, they might have just deleted a 0 lol)
1022 / (1 + 123 x (2.71828-0.00412 x Rating))) + 580
IF Rating <~150
Unknown