Add: armor plates support with new database tables and loadout functionality

fix: only required mods are applied to guns for weight management.

migration_add_plates.sql

@@ -0,0 +1,21 @@
+-- Migration: add armor plates support
+-- Run: sqlite3 tarkov.db < migration_add_plates.sql
+
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE IF NOT EXISTS armor_open_slots (
+    carrier_id  TEXT NOT NULL REFERENCES gear_items(id) ON DELETE CASCADE,
+    slot_nameid TEXT NOT NULL,
+    zones       TEXT,
+    PRIMARY KEY (carrier_id, slot_nameid)
+);
+
+CREATE TABLE IF NOT EXISTS armor_slot_plates (
+    carrier_id  TEXT NOT NULL,
+    slot_nameid TEXT NOT NULL,
+    plate_id    TEXT NOT NULL REFERENCES gear_items(id) ON DELETE CASCADE,
+    PRIMARY KEY (carrier_id, slot_nameid, plate_id),
+    FOREIGN KEY (carrier_id, slot_nameid) REFERENCES armor_open_slots(carrier_id, slot_nameid) ON DELETE CASCADE
+);
+
+CREATE INDEX IF NOT EXISTS idx_armor_slot_plates_plate ON armor_slot_plates(plate_id);