Add an example to load dictionaries by path

examples/load-dictionary.rs

@@ -0,0 +1,29 @@
+use std::{fs, io, time::Instant};
+
+use spellbook::Dictionary;
+
+macro_rules! usage {
+    () => {
+        eprintln!("Usage: load-dictionary path/to/dict.aff path/to/dict.dic");
+        eprintln!("  Note: some shells accept a syntax like path/to/dict.{{aff,dic}}");
+        std::process::exit(1);
+    };
+}
+
+fn main() -> io::Result<()> {
+    let mut args = std::env::args().skip(1);
+    let Some(aff) = args.next() else {
+        usage!();
+    };
+    let Some(dic) = args.next() else {
+        usage!();
+    };
+    let aff = fs::read_to_string(aff)?;
+    let dic = fs::read_to_string(dic)?;
+    let now = Instant::now();
+    match Dictionary::new(&aff, &dic) {
+        Ok(_) => println!("Compiled the dictionary in {:?}", now.elapsed()),
+        Err(err) => eprintln!("Failed to compile the dictionary: {err}"),
+    }
+    Ok(())
+}