Refactoring about zellen HOT 4 OPEN

First steps done:

• Moved helper functions to its own lib/helpers.lua and wrote some unit tests for them.
• Removed some deprecated code

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More:

• Moved config and state to their own files in lib

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@sarweiler How do you feel about moving more of the logic to the "board"? I think that maybe the game of life logic could be moved into its that space. Then the sequencing logic can query the board as is, or each cell in the grid can have "do" functions when they are activated?

cells can also have things like "next" -the next cell to be triggered. They can also keep track of things like frequency of activation or counts of manual intervention by the user.

If you feel this idea isn't too disruptive i can make the change in my fork.

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Sounds great! I was planning to create a Board class that contains the board and game logic that is connected directly to the board. I haven't started yet, so feel free to go in that direction!

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