feat: integrate Tailwind CSS with custom theme and animations

Added Tailwind CSS and tw-animate-css imports to globals.css. Introduced a custom dark variant and an extensive @theme inline block with CSS variables for colors, radii, and animations. Included keyframes for shimmer-slide, spin-around, gradient, shine, and background-position-spin to enable consistent theming and dynamic UI effects across the application.

types/currency.ts

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+export type Currency = "gp" | "tc";
+
+export interface Price {
+  value: number;
+  currency: Currency;
+  tcEquivalent?: number; // 1 TC ≈ 35.000 gp
+}
+
+export interface TibiaProtection {
+  fire?: number;
+  ice?: number;
+  energy?: number;
+  earth?: number;
+  death?: number;
+  holy?: number;
+}
+
+export interface TibiaStats {
+  attack?: number;
+  defense?: number;
+  armor?: number;
+  weight?: number;
+  speed?: number;
+  manaRegen?: number;
+  hpRegen?: number;
+  skillBoost?: {
+    sword?: number;
+    axe?: number;
+    club?: number;
+    distance?: number;
+    shielding?: number;
+    fishing?: number;
+  };
+}
+
+export interface TibiaRequirements {
+  level?: number;
+  vocation?: "Knight" | "Paladin" | "Sorcerer" | "Druid" | "No Vocation";
+}

types/item.ts

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+import { TibiaStats, TibiaRequirements, TibiaProtection } from "./currency";
+
+export interface TibiaItem {
+  id: string;
+  name: string;
+  image: string;
+  category:
+    | "weapon"
+    | "armor"
+    | "helmet"
+    | "legs"
+    | "boots"
+    | "shield"
+    | "amulet"
+    | "ring"
+    | "potion"
+    | "rune"
+    | "tool"
+    | "ammunition"
+    | "other";
+  rarity: "common" | "uncommon" | "rare" | "epic" | "legendary";
+  stats?: TibiaStats;
+  requirements?: TibiaRequirements;
+  protections?: TibiaProtection;
+  stackable?: boolean;
+  dropLocation?: string;
+  npcPrice?: number;
+  price: {
+    buy: number;
+    sell: number;
+    bid?: number;
+  };
+  priceHistory: {
+    highest: number;
+    lowest: number;
+    average: number;
+  };
+}
+
+export interface MarketOffer {
+  id: string;
+  item: TibiaItem;
+  seller: string;
+  price: number;
+  quantity: number;
+  type: "buy" | "sell";
+  timestamp: Date;
+}