Challenge: Parse Account Data Buffer

Write a function that parses a binary account data buffer into a structured object.

Requirements

• Parse a Uint8Array containing the following fields (in order):
  1. version (u8, 1 byte): Account version number
  2. level (u32, 4 bytes, little-endian): User level
  3. username (string): Length-prefixed UTF-8 string (u32 length + bytes)
• Return an object with { version: number, level: number, username: string }
• Use DataView for reading integers and TextDecoder for the string