fix: Panic on long numerical file names

Closes: #258

[lexical_sort](https://github.com/Aloso/lexical-sort) is currently
unmaintained. The author recommends switching to the `icu` crate which
is maintained by the Unicode Consortium.

src/localize.rs

@@ -1,9 +1,13 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
+use std::str::FromStr;
+
 use i18n_embed::{
     fluent::{fluent_language_loader, FluentLanguageLoader},
     DefaultLocalizer, LanguageLoader, Localizer,
 };
+use icu::collator::{Collator, CollatorOptions, Numeric};
+use icu_provider::DataLocale;
 use once_cell::sync::Lazy;
 use rust_embed::RustEmbed;
 
@@ -21,6 +25,20 @@ pub static LANGUAGE_LOADER: Lazy<FluentLanguageLoader> = Lazy::new(|| {
     loader
 });
 
+pub static LANGUAGE_SORTER: Lazy<Collator> = Lazy::new(|| {
+    let mut options = CollatorOptions::new();
+    options.numeric = Some(Numeric::On);
+    let collator = {
+        let current = LANGUAGE_LOADER.current_language().to_string();
+
+        let locale = DataLocale::from_str(&current).unwrap();
+        let collator = Collator::try_new(&locale, options).unwrap();
+        collator
+    };
+
+    collator
+});
+
 #[macro_export]
 macro_rules! fl {
     ($message_id:literal) => {{