added testing for pickup, cut tomato

Added a cutting-board-counter which can process cuttable items.
A player can hold the interact key for the cut process to progress.
Tied to simulator frequency.

Resolve "2D movement continuous"

Closes #4

See merge request scs/cocosy/overcooked-simulator!2

# Conflicts:
#   overcooked_simulator/main.py

Issue #6 Base simulator class and methods

See merge request scs/cocosy/overcooked-simulator!1

Added basic class structure. Main simulation runner, basic environment structure, players, actions, counters.