New Game: Assault Chess

A dexterity game inspired by shove hapenny or crokinole. Both players start with 3 coins or checkers in their arsenal. Instead of a turn, you can target a piece, and flick a coin or checker across the board at it. If it pushes the piece out of its square, that piece is captured. (Either colour.) If a different piece gets pushed, it goes back, and your opponent gets the checker.
If the coin falls off the board, your opponent gets it.
If it stays on the board, centre it on the space, and then it can be captured like a neutral piece.

No files, tests, or entry points are identified. Start by reviewing how existing games in chess-kit are structured, then determine where the Assault Chess rules belong and how their behavior is tested. Done means the described coin-flicking, capturing, returning, and off-board rules are implemented and verified.

Written by the indexing model from the issue text.