Mostly ER fixes (but some new options too!)

Major:

• adds start inventory from pool and minHP, and damage boost options

Logic:

• update temple coin to allow obscure swimming to access the check
• made classification for HeartPiece as well as making flashlight dynamic based on settings

Minor:

• minor rule optimization
• pulling generic rule utils out to their own file and removing some unnecessary util wrappers
• clean up imports across the apworld
• some minor cleanup in rules.py
• logic refactor now that has_sword is fast
• update count rules to use state.has passing in count
• un-obscure option checking and adding data_version to be set after item/location name rework
• use World instead of MultiWorld for can_create option checking
• updated rules to use a custom collect/remove flag instead of re-evaluating has_sword on every location check

Bugfix:

• fix bugs in ER starting entrance and minhp item filling
• updating doc name again to play nice,,
• move er_region_list instantiating to a per-instance level to not leak the multiworld
• update filler item loop to only check locations in current world instead of entire multiworld
• handle errors on interpret_slot_data better and allow create_item to be done with world=none

ER:

• updates to be in line with latest generic-entrance-rando
• add path hints to locations and spoiler log
• ER Bugfixes and update ER regions to add more darkroom rules where needed
• updated free ER location check to let the game actually know about it and (maybe temporarily) moved it to always instead of just on 1p seeds
• import entrance type from new generic er location