[feat] Rust equivalent convertFileSrc()

[Iaphetes]

Describe the problem

I'm currently trying to write a markdown editor in Tauri. For this I need to convert the file paths the user enters to tauris file paths.
Since I use a Rust library to parse the markdown to HTML, I need to do the file path conversion in Rust.

Describe the solution you'd like

For this reason I'd like to have the convertFileSrc() function in Rust.

Alternatives considered

Currently I'm trying to either call the Javascript version of the function from within Rust but this is hacky and I'd like to have a native way.

I'm also considering just passing a template to rust at the start of the program, that describes the transformation, but this feels also somewhat prone to breaking.

Additional context

No response