Rework drawing cards, associated replacement effects, and removing cards from library; implement [WHO] River Song

[xenohedron]

1. Remove obsolete MageAction framework, move code directly into PlayerImpl::drawCards
2. Clarify event for drawing two or more cards
3. Clarify methods for drawing cards from library
4. Add support for replacement effects to draw from bottom rather than top of library
5. Implement [WHO] River Song
6. Fix Teferi's Ageless Insight incorrect interaction with "for each card drawn this way" #12616 by storing number of cards drawn through the replacement event

[JayDi85]

Be careful, remove and draw are different actions. [[Grenzo, Dungeon Warden]]

BTW found source of the nulls in cards list — must be fixed by null check:

[github-actions]

Grenzo, Dungeon Warden - (Gatherer) (Scryfall) (EDHREC)

{X}{B}{R}
Legendary Creature — Goblin Rogue
2/2
Grenzo, Dungeon Warden enters with X +1/+1 counters on it.
{2}: Put the bottom card of your library into your graveyard. If it's a creature card with power less than or equal to Grenzo's power, put it onto the battlefield.

[JayDi85]

And don’t forget to add cards removing in code like that here. Maybe it’s better to keep removeFromXXX methods.

[xenohedron]

Be careful, remove and draw are different actions. [[Grenzo, Dungeon Warden]]

Yeah, if it's not a draw, then it shouldn't be flagging empty library for game loss. But some devs in the past occasionally choose wrong method. Cellar Door is the one I fixed here.

BTW found source of the nulls in cards list — must be fixed by null check

I don't see the problem? CardsImpl won't add null

Maybe it’s better to keep removeFromXXX methods.

Yeah, after further consideration, I'm inclined to agree. I don't like that the code requires it, but for now, best to make minimal changes on that front.