[WIP] Project Kairos Update

I've been meaning to do this for a while but only recently got time and
energy to work on this, ever since DDA finally added the stuff utilized
in #253 I can also add
the intended reward for completing Nicholas' mission chain.

Combining all the research from the missions both Sofia and Nicholas
send you after will allow Nicholas to make a device that draws on the
energy from portals, much like the restored ritual blade. Its effect
when activated is a powerful AoE healing spell affecting the user and
any allies in the radius, as well as fixing terrain like Consecrate and
having a similiar regrowth effect to the Sacrificial Regrowth spell I
helped Foulman write for
CleverRaven/Cataclysm-DDA#37254.

Arcana_BN/items/tool_armor.json

@@ -693,6 +693,25 @@
     },
     "extend": { "flags": [ "TRADER_AVOID", "NO_TAKEOFF" ] }
   },
+  {
+    "id": "divine_sealing_charm",
+    "looks_like": "small_relic",
+    "type": "TOOL_ARMOR",
+    "category": "tools",
+    "name": { "str": "divine sealing charm" },
+    "description": "A silver and gold relic encircling and framing a pitch-black gem.  All across the metal are holy symbols and engraved text mixing archaic Latin, Old Norse runes, and symbols that don't seem to match any writing humans have devised.  Combining dimensional fatigue research with the knowledge of multiple arcane orders, it was made to serve the same purpose as the Keepers' relics and Project Kairos.\n\nLinger near a portal to seal it, drawing energy from its collapse.  Channeling this energy will create a powerful healing effect affecting you and nearby allies, remove alien influence on your surroundings, as well as restore dead plant life nearby.",
+    "weight": "1200 g",
+    "volume": "750 ml",
+    "price_postapoc": "150 USD",
+    "material": [ "silver", "gold", "essencemat" ],
+    "symbol": "[",
+    "color": "yellow",
+    "max_charges": 10,
+    "charges_per_use": 1,
+    "use_action": [ { "type": "cast_spell", "spell_id": "arcana_item_divine_seal", "no_fail": true, "need_worn": true, "level": 0 } ],
+    "artifact_data": { "charge_type": "ARTC_PORTAL", "effects_worn": [ "AEP_PSYSHIELD" ] },
+    "flags": [ "UNBREAKABLE_MELEE", "NO_SALVAGE", "DIMENSIONAL_ANCHOR" ]
+  },
   {
     "id": "cleric_ring",
     "type": "TOOL_ARMOR",