make sure generated icon code adheres to styles (#419)

Author: MoSattler

other/build-icons.ts

@@ -1,4 +1,5 @@
 import * as path from 'node:path'
+import { $ } from 'execa'
 import fsExtra from 'fs-extra'
 import { glob } from 'glob'
 import { parse } from 'node-html-parser'
@@ -147,5 +148,6 @@ async function writeIfChanged(filepath: string, newContent: string) {
 		.catch(() => '')
 	if (currentContent === newContent) return false
 	await fsExtra.writeFile(filepath, newContent, 'utf8')
+	await $`prettier --write ${filepath}`
 	return true
 }