feat: add a white theme

components/ThemeToggleButton.tsx

@@ -0,0 +1,19 @@
+"use client";
+
+import { Moon, Sun } from "lucide-react";
+import { useTheme } from "@/lib/theme";
+
+export default function ThemeToggleButton() {
+    const { theme, toggle } = useTheme();
+
+    return (
+        <button
+            onClick={toggle}
+            aria-label="Changer de thème"
+            className="flex items-center justify-center w-8 h-8 rounded-md border border-wy-border text-wy-text-secondary hover:text-wy-text-primary hover:bg-white/[0.06] transition-all duration-150"
+        >
+            {theme === "dark" ? <Sun size={15} /> : <Moon size={15} />}
+        </button>
+    );
+}
+