When only closing the gate tiles the tower next to them are still
passable rendering the card useless.
To fix this also lock the towers.

* more rule highlights
* typo fixes
...

The push mechanic is heavily inspired by `Into the Breach`.
Pushing a permanent moves it involuntarily in a straight line.
On collisions units receive damage and permenents pushed onto free but
unavailable tiles are destroyed.

Currently misinformation token are not working as intended, because they
could not be part of a players deck because they are tokens.
But it is a fundamental part of their design that they delute a players deck.

So handle them like other real cards withou buycost like farmers.

Specify that tokens can not exists in discard piles or decks and
that cards without buy cost can not be part of stores or drafts.