Extend convert-json-schema with basic help (#195)

Author: ykhrustalev

src/bin/convert-json-schema.rs

@@ -1,6 +1,22 @@
 use outlines_core::prelude::*;
 
+fn print_help() {
+    println!("JSON Schema to Regex Converter\n");
+    println!("Usage:");
+    println!("  cat schema.json | convert-json-schema");
+    println!("  convert-json-schema --help\n");
+    println!("Options:");
+    println!("  --help    Show this help message\n");
+    println!("Description:");
+    println!("  Reads a JSON Schema from stdin and converts it to a regular expression.");
+}
+
 fn main() {
+    if std::env::args().any(|arg| arg == "--help") {
+        print_help();
+        return;
+    }
+
     let schema = std::io::read_to_string(std::io::stdin()).unwrap();
     let regex = json_schema::regex_from_str(&schema, None).unwrap();
     println!("Regex: {}", regex);