Add berserk duration calculation

[QuickStick123]

Todo:

• Add support for rage gain on hit.
• Add support for lose rage if haven't been hit recently
• Implement warcry and on kill rage generation rate in berserk.
• Update breakdown to include more relevant info.

.lua and .txt are out of sync

Fixes https://github.com/PathOfBuildingCommunity/PathOfBuilding/issues/4862

This adds skill duration to berserk tab based off a small simulation.

Link to a build that showcases this PR:

https://pobb.in/n5qRy_C76Q3n