feat: ✨ add raw base64 decoder

src/utils.ts

@@ -1,4 +1,5 @@
 import { JsonValue } from '$std/json/common.ts'
+import { decodeBase64 } from "@std/encoding/base64"
 
 export type JsonCompatible = JsonValue | { toJSON(): JsonValue } | unknown
 
@@ -77,3 +78,8 @@ function getCookie(name: string): string | undefined {
 	const cookies = Object.fromEntries(cookiesEntries)
 	return cookies[name]
 }
+
+export function base64ToString(base64: string): string {
+	const bytes = decodeBase64(base64)
+	return new TextDecoder().decode(bytes)
+}