Rules.py misc changes

[nicopop]

I got inspired by what I said on discord in manual-core-dev channel and I went and really looked at the rules.py file
things included in this PR so far:

• Replaced the old state.counts call loops with calls to either state.has or state.has_from_list
  • fixes events not being accessible via @category, :half/:all
• Added Some type anotations to make mypy happy
• Made item_count convert back to item_name if the count is an unknown string

that last point can be reverted/modified if we still want it to raise an exception instead

[nicopop]

Actuallly im putting this PR on pause until the rule builder one is merged (link here once its created)

[silasary]

#203 is the rule builder PR

[nicopop]

with pr #203 merged ill adapt this PR to the new code,
I don't have time this week but I should work on this soonish™

[nicopop]

with pr #203 merged ill adapt this PR to the new code, I don't have time this week but I should work on this soonish™

I didnt mean to lie when I said that, I just got inspired when doing the preparatory merge from main to fix the conflicts