added types declarations

package.json

@@ -1,6 +1,6 @@
 {
   "name": "luxon-hijri",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "A Hijri date converter based on the Umm al-Qura calendar system, using Luxon for date manipulations.",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/index.d.ts

@@ -0,0 +1,11 @@
+// Define interfaces and types if necessary
+interface HijriDate {
+    hy: number; // Hijri Year
+    hm: number; // Hijri Month
+    hd: number; // Hijri Day
+}
+
+// Export functions with their signatures
+export function toGregorian(hy: number, hm: number, hd: number): Date | null;
+export function toHijri(gregorianDate: Date): HijriDate | null;
+export function formatHijriDate(hijriDate: HijriDate, format: string): string;