feat(eslint.config.js): add rule for extraneous dependencies

This commit adds a new rule to the ESLint configuration for TypeScript.
The rule 'import/no-extraneous-dependencies' is set to 'error', which
will help to prevent importing dependencies that are not declared in
the package.json file.

eslint.config.js

@@ -4,5 +4,8 @@ export default ryoppippi({
 	svelte: false,
 	typescript: {
 		tsconfigPath: './tsconfig.json',
+		overrides: {
+			'import/no-extraneous-dependencies': ['error'],
+		},
 	},
 });