refactor(pwa): ♻️ rename Strategy to FetchStrategy

src/serviceworker/src/fetch_strategy.ts

@@ -1,7 +1,7 @@
-export class Strategy {
+export class FetchStrategy {
 	private constructor() {
 		throw new Error(
-			'fetch Strategy is not instantiable and only expose static methods',
+			'FetchStrategy is not instantiable and only expose static methods',
 		)
 	}