sort FStrings

- easier to read
- ensures things don't break when ankirspy and anki wheels built
on separate machines due to mismatched directory order

rslib/build.rs

@@ -15,6 +15,8 @@ fn get_identifiers(ftl_text: &str) -> Vec<String> {
         }
     }
 
+    idents.sort();
+
     idents
 }