refactor: split Game.sol to fit under contract size

[0xnonso]

Context (Problem, Motivation, Solution)

Game.sol contract code size exceeds max limit. closes https://github.com/0xFableOrg/0xFable/issues/92.

Describe Your Changes

Split Game.sol to fit under contract size.

Checklist

• [x] I have performed a self-review of my code
• [x] I ran make check and fixed resulting issues
• [x] I ran the relevant tests and they all pass
• [ ] I wrote tests for my new features, or added regression tests for the bug I fixed

Testing

nil

[norswap]

You need to rebase this onto master locally.

Here's how you can do it:

# this will remove your merge commit and your revert to the equivalent state without these commits
git reset --hard head~2

git remote add upstream git@github.com:0xFableOrg/0xFable.git
# or if using https: git remote add upstream https://github.com/0xFableOrg/0xFable.git
git fetch upstream
git rebase origin/master
git push --force

After that we should be able to merge this here easily. Don't hesitate to reach out if you run into any problem.

[norswap]

🚀