Save `libraryData` using `@solid-primitives/filesystem`

[jer3m01]

Instead of writing the data to system yourself, you can use @solid-primitives/filesystem to make a wrapper to tauri fs.

Once your libraryData is reactive (i.e. using a store from #6 in a context #5)

await writeTextFile(
  {
    path: "data.json",
    contents: JSON.stringify(libraryData(), null, 4),
  },
  {
    dir: BaseDirectory.AppData,
  },
)

// becomes

const tfs = makeTauriFileSystem({dir: BaseDirectory.AppData});
const fs = createFileSystem(tfs);
 
// This will automatically write the file each time `libraryData` is changed 
// Only write this once! This will run whenever the store is updated (from anywhere)
createEffect(() => fs.writeFile("data.json", JSON.stringify(unwrap(libraryData), null, 4)));

Solid docs:
https://docs.solidjs.com/concepts/effects#effects
https://docs.solidjs.com/reference/basic-reactivity/create-effect
https://docs.solidjs.com/concepts/stores#extracting-raw-data-with-unwrap

Solid Primitives docs:
https://primitives.solidjs.community/package/filesystem