Use custom rolls #695

[wake42]

This PR is a "big bang" rewrite of all Roll handling including combat, introducing a lot more automation. It uses Foundry v12 features so it will also fix some warnings related to Foundry v12 deprecations.

• [ ] closes #695
• [ ] closes #116
• [ ] closes #138
• [ ] closes #526
• [ ] closes #115
• [ ] closes #447
• [ ] closes #613
• [ ] closes #705
• [x] closes #716
• [ ] closes #711
• [ ] closes #434
• [x] closes #712