chore: migrated to new build system and eslint defineConfig

[petruki]

This pull request introduces several updates to modernize the Angular project, including migration to the new Angular build system, dependency upgrades, and build configuration improvements. The changes aim to align the project with the latest Angular standards, streamline build outputs, and improve maintainability.

Build system migration and configuration updates:

• Migrated from @angular-devkit/build-angular to the new @angular/build builders in angular.json, updating build, serve, and extract-i18n targets, and refactored related build options (e.g., outputPath, serviceWorker configuration, removed deprecated options). [1] [2] [3] [4] [5]
• Updated Dockerfile to copy the correct browser build output directory (dist/switcher-management/browser) for deployment.

Dependency and tooling updates:

• Upgraded Angular dependencies and related packages to the latest patch versions in package.json, and replaced deprecated devDependencies with their modern equivalents. [1] [2]
• Migrated ESLint configuration from CommonJS (eslint.config.js) to ESM (eslint.config.mjs) using the new defineConfig API and ES module imports.

Other improvements:

• Removed redundant import of @angular/localize/init from src/main.ts as it is now included via the build configuration.