EsLint v9 (#154)

* Upgrade ESLint and related configurations to version 9

- Update ESLint to version 9.19.0
- Migrate ESLint configurations to flat config format
- Remove deprecated ESLint config files
- Update package dependencies and configurations
- Simplify ESLint setup across packages
- Remove unnecessary ESLint config blocks from package.json files
- Improved CI caching with Turborepo tasks
- Removed duplicate styles

packages/shared/src/registry/index.ts

@@ -1,9 +1,7 @@
 /**
  * Implementation factory type
  */
-export type ImplementationFactory<T> = () =>
-  | T
-  | Promise<T>;
+export type ImplementationFactory<T> = () => T | Promise<T>;
 
 /**
  * Public API types with improved get method
@@ -34,10 +32,10 @@ export interface Registry<T, Names extends string> {
  * @description Creates a new registry instance with the provided implementations.
  * @returns A new registry instance.
  */
-export function createRegistry<
+export function createRegistry<T, Names extends string = string>(): Registry<
   T,
-  Names extends string = string,
->(): Registry<T, Names> {
+  Names
+> {
   const implementations = new Map<Names, ImplementationFactory<T>>();
   const setupCallbacks = new Map<string, Array<() => Promise<void>>>();
   const setupPromises = new Map<string, Promise<void>>();