feat: update steno to support multiple content types

[SgtPooki]

• update type that write expects to support the same as fs.fileWrite
• adds tests for additional types (Buffer and Uint8Array). You can see that these already work without the typefix at https://github.com/SgtPooki/fast-write-atomic#benchmarks

[SgtPooki]

@typicode if you looked at this previously, it was messy. it's cleaner now without lint fixes.

[typicode]

Thank you!