Add Facebreaker unique gloves support

[Anakior]

Description of the problem being solved:

Adds Facebreaker and support since i'm playing it for its three modifiers that currently show up as "Not supported in PoB yet":

• Has 8 to 12 Physical damage, +3 to +4 per Boss's Face Broken (also the Fire variant)
• Can Attack as though using a One Handed Mace while both of your hand slots are empty
• Unarmed Attacks that would use an Equipped One Hand Mace's damage use this Item's damage

Steps taken to verify a working solution:

The "attack as a One Hand Mace while unarmed" bit works like Hollow Palm: when both hands are empty I set weaponData1.asThoughUsing["One Hand Mace"] in CalcSetup so mace skills become usable. The hits stay unarmed-flagged (it only satisfies the weapon requirement, it doesn't grant mace scaling). The item's base damage is added as flat unarmed damage.

The per Boss's Face Broken part is a Multiplier:BossFaceBroken driven by a new config option ("# of Boss's Faces Broken"), since that count isn't exposed by the character API and has to be entered manually like other "per X" stacks.

Also added the unique to Data + Export, regenerated ModCache, and added tests in spec/System/TestFacebreaker_spec.lua.

Screenshot

[vaisest]

The per Boss's Face Broken part is a Multiplier:BossFaceBroken driven by a new config option ("# of Boss's Faces Broken"), since that count isn't exposed by the character API and has to be entered manually like other "per X" stacks.

This is incorrect. The API does have this info in the quest field

Edit:

      "quest_stats": [
        "\u002B20 to maximum Life",
        "5% increased maximum Life",
        "5% increased maximum Mana",
        "\u002B100 to [Spirit|Spirit]",
        "\u002B5% to all [ElementalDamage|Elemental] [Resistances]",
        "\u002B15% to [Resistances|Fire Resistance]",
        "\u002B15% to [Resistances|Cold Resistance]",
        "\u002B15% to [Resistances|Lightning Resistance]",
        "30% increased Life Recovery from [Flask|Flasks]",
        "30% increased Global [Armour], [Evasion] and [EnergyShield|Energy Shield]",
        "25% increased [StunThreshold|Stun Threshold]",
        "30% increased [Charm] Charges gained",
        "\u002B1 [Charm] Slot",
        "57 [BrokenFace|Broken Boss Faces]"
      ]

[Anakior]

Oh ok. I didn't saw that field, thanks a lot !

I have updated the branch to get it from this and auto fill the config but didn't removed it from the config if people want to theorycraft on it.