feat(adapters): instantiated AdapterRegistry

instanced the AdapterRegistry so there only would be one accessible registery everywhere
accessible and registerd the native adapter in barrel file (index.ts file)

src/adapters/AdapterRegistry.ts

@@ -13,7 +13,7 @@ type AdapterConstructor = new (
   options?: AdapterConfig
 ) => AdapterAPI;
 
-export class AdapterRegistry {
+class AdapterRegistry {
   private adapters: Map<string, AdapterConstructor> = new Map();
 
   registerAdapter(type: string, constructor: AdapterConstructor): void {
@@ -35,3 +35,5 @@ export class AdapterRegistry {
     return new construct(video, options);
   }
 }
+
+export const adapterRegistry = new AdapterRegistry();

src/adapters/index.ts

@@ -1 +1,7 @@
+import { adapterRegistry } from './AdapterRegistry';
+import { NativeAdapter } from './Native';
+
+adapterRegistry.registerAdapter('native', NativeAdapter);
+
+export { adapterRegistry } from './AdapterRegistry';
 export { NativeAdapter } from './Native';