use config.ts, apply prettier to more files

prettier.config.ts

@@ -0,0 +1,12 @@
+import {type Config} from 'prettier'
+
+const config: Config = {
+  semi: false,
+  arrowParens: 'avoid',
+  bracketSameLine: true,
+  bracketSpacing: false,
+  singleQuote: true,
+  trailingComma: 'all',
+}
+
+export default config