Add support for chance to detonate mines an additional time

[MatthewSbar]

This is my first contribution so hopefully I did everything right 🤷

Description of the problem being solved:

"Mines have a #% chance to be Detonated an Additional Time" (Expert Sabotage medium cluster notable, the Careful Handling wheel, and crucible weapon mods) was unrecognised. This PR adds a MineAdditionalDetonationChance modifier, capped at 100% (my understanding is that additional detonations isn't re-rolled on success or "surpassing" in poe2 terms) and applied as an average DPS multiplier via skillData.dpsMultiplier. Shown as "Extra Deton. Chance" in the Calcs tab Mines section with a breakdown.

Steps taken to verify a working solution:

• New regression test in TestOffence_spec.lua: 10% chance gives 1.10x TotalDPS on Stormblast Mine, stacking is additive and capped at 100% (2.0x), and non-mine skills are unaffected
• Verified damage numbers are logical using my own build before/after this PR

Link to a build that showcases this PR:

Here's my own build this league
https://pobb.in/JZyvthjUn70B

Before screenshot:

After screenshot: