[feat] Support multi encoding writeTextFile/readTextFile of "@tauri-apps/api/fs"

[neko3cs]

Describe the problem

I want to write/read texts encoding shift_jis using writeTextFile/readTextFile of "@tauri-apps/api/fs".
But writeTextFile/readTextFile support only "utf8".

Describe the solution you'd like

I suggest multi support encoding.
Rust have shift_jis encoding.

SHIFT_JIS in encoding_rs - Rust

Alternatives considered

No response

Additional context

No response

[FrankSmith22]

I second this! I also am experiencing this problem with my Tauri app, and having to spend significant time researching workarounds as I am a complete Rust novice. As a side note, if anyone could point me in the right direction as to the easiest way to read/write non-utf8 encoded files in Rust, I would greatly appreciate that.