Description of the problem being solved:

Patch 3.29 updates a large number of existing unique items (see 3.29 Unique Item Changes).

This PR implements issue #9956, adding the corresponding numerical and modifier changes while preserving legacy variants where required.

• Abberath's Horn now has 80-120% increased Global Critical Strike Chance and 30-50% to Damage over Time Multiplier for Ignite from Critical Strikes. It no longer has increased Fire Damage.
• Atziri's Rule now has 100-300% increased Spell Critical Strike Chance.
• Breath of the Council now has 80-120% increased Chaos Damage, 10-20% increased Area of Effect, and Chaos Skills have 40-80% increased Skill Effect Duration.
• Cane of Unravelling now has +1 to Maximum Power Charges, 5% increased Cast Speed per Power Charge, and regenerates 5 Mana per second per Power Charge. It no longer has increased Chaos Damage.
• Cerberus Limb now has 20-40% increased Cast Speed.
• Disintegrator now has 2% additional Physical Damage Reduction from Hits and adds 20-23 to 26-30 Physical Damage to Attacks and Spells per Siphoning Charge.
• Doryani's Delusion now uses the Leviathan Greaves, Velour Boots, and Warlock Boots base types. Current variants have the new defensive, Life, Movement Speed, Corruption, and Level 30 Purity values.
• Duskdawn and Replica Duskdawn now have +20-30% Chance to Block Attack Damage while wielding a Staff.
• Emberwake now has 10-20% increased Cast Speed and 35% less Burning Damage.
• Replica Emberwake now has 10-20% increased Cast Speed and Ignites deal Damage 40-60% faster.
• The Grey Spire now has doubled Implicit Modifier magnitudes, 300-400% increased Global Damage, and +1-5% to all maximum Resistances.
• The Grey Wind now adds Fire Damage equal to 6-10% of Player Maximum Life.
• The Gull now has 25-50% increased Effect and Duration of Shrine Effects.
• Hateforge now has 20-40% increased Rage Cost Efficiency.
• Honourhome now has 30-50% increased Mana Cost Efficiency.
• Jiquani's Potential now adds 1 to 24-35 Lightning Damage to Spells per 10 Intelligence.
• Lioneye's Remorse now has -150 Physical Damage taken from Projectile Attacks.
• Mask of the Stitched Demon now regenerates 1% of Life per second per 500 Player Maximum Energy Shield.
• Mask of the Tribunal now has 3% increased Mana Reservation Efficiency per 250 total Attributes.
• Martyr of Innocence now has +20-25% Chance to Block Attack Damage while wielding a Staff and 100-200% increased Fire Damage.
• Maw of Mischief now has 40-60% increased Mana Cost Efficiency of Minion Skills.
• Militant Faith now has 3% increased Mana Cost Efficiency per 10 Devotion.
• Mystic Refractor now has 10-50% increased Projectile Speed.
• Nebulis now has 6-8% increased Elemental Damage per 1% Fire, Cold, or Lightning Resistance above 75%.
• Ngamahu's Sign now has +400-600 Armour.
• Praxis now has 20-30% increased Mana Cost Efficiency.
• Realmshaper now grants +2 to Level of Socketed Fire and Cold Gems.
• Rathpith Globe now has 3% increased Spell Critical Strike Chance and Spell Damage per 100 Player Maximum Life.
• Shimmeron now has +1 to Maximum Power Charges, adds 3 to 15-25 Lightning Damage to Spells per Power Charge, and deals 300 Lightning Damage per second per Power Charge after dealing a Critical Strike Recently. It no longer has the previous flat Lightning Damage or increased Spell Damage modifiers.
• Singularity now has 10-20% increased Mana Cost Efficiency.
• Stasis Prison now has 80-100% increased Implicit Modifier magnitudes and no longer has +80-100 to Maximum Life.
• Stormfire now adds 1-3 to 125-145 Lightning Damage to Hits against Ignited Enemies.
• Taryn's Shiver now has +2-4 to Level of all Cold Spell Skill Gems, 80-140% increased Cold Damage, and 25-50% chance to Freeze. It no longer has increased Spell Damage.
• Tawhanuku's Timing now has +60-80 Maximum Energy Shield and restores Energy Shield every third Upfront Spell Cost.
• Tidebreaker now grants Brine Charges instead of increased Physical Damage per Endurance Charge. Brine Charges grant Physical Damage as Extra Cold and Lightning Damage, with Maximum Brine Charges equal to Maximum Endurance Charges.
• Tukohama's Fortress now has +500 Armour per Summoned Totem.
• Replica Tulfall now has 20-30% increased Cold Damage per Frenzy Charge.
• Replica Tukohama's Fortress now has 30% increased Critical Strike Chance per Brand.
• Valako's Sign now has +100-150 Maximum Mana.
• The Vertex now causes Socketed Gems to have 50% less Mana Cost.
• Void Battery now has 10-15% increased Spell Damage per Power Charge, 50% reduced Spell Damage, and +100-120 Maximum Mana.
• Voidfletcher now uses the Ornate Quiver base type, has two additional Sockets, and gains a Void Charge every second. It no longer has Mana gained on Kill or increased Projectile Speed.
• Wyrmsign now has 10% increased Mana Cost Efficiency per Endurance Charge.
• Yaomac's Accord now grants +1-2 to Level of all Vaal Skill Gems.

The missing changes are the Foulborn modifiers.

Changes from the Gem Socket Changes, Talisman Revamp, and unique-granted skill sections are intentionally outside the scope of this PR.

Link to a build that showcases this PR:

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Before screenshot:

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After screenshot:

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