refactor: lazy-init EcUtils native object for getCurves()

Defer HybridObject allocation until getCurves() is actually called,
avoiding an unnecessary native object creation at module import time.

Author: boorad

packages/react-native-quick-crypto/src/ec.ts

@@ -35,8 +35,13 @@ import { Buffer } from '@craftzdog/react-native-buffer';
 import { ECDH } from './ecdh';
 
 class EcUtils {
-  private static native =
-    NitroModules.createHybridObject<EcKeyPair>('EcKeyPair');
+  private static _native: EcKeyPair | undefined;
+  private static get native(): EcKeyPair {
+    if (!this._native) {
+      this._native = NitroModules.createHybridObject<EcKeyPair>('EcKeyPair');
+    }
+    return this._native;
+  }
   public static getSupportedCurves(): string[] {
     return this.native.getSupportedCurves();
   }