Chore: Setup testing library (#44)

* Setup svelte testing library

* Renamed to counter, makes more sense

* Removed test component

Author: Hugos68

package.json

@@ -40,6 +40,7 @@
 		"@sveltejs/package": "^2.0.0",
 		"@sveltejs/vite-plugin-svelte": "^3.0.0",
 		"@testing-library/jest-dom": "^6.4.2",
+		"@testing-library/svelte": "^5.1.0",
 		"@types/eslint": "^8.56.0",
 		"@typescript-eslint/eslint-plugin": "^7.0.0",
 		"@typescript-eslint/parser": "^7.0.0",