📚 Add help message and update script metadata hashes due to main.rs changes

md-rs/src/main.rs

@@ -30,6 +30,24 @@ fn main() {
         return;
     }
     let first_arg = args.first();
+    if let Some(first_arg) = first_arg {
+        if first_arg == "--help" || first_arg == "-h" {
+            println!(
+                r##"md.rs - Markdown render
+
+md.rs -h|--help
+
+cat README.md | md.rs
+md.rs cheat:
+md.rs cheat:xh
+md.rs README.md
+md.rs https://example.com/sample.md
+"##
+            );
+            return;
+        }
+    }
+
     match read_to_string(first_arg) {
         Ok(md) => {
             termimad::print_text(&md);
@@ -122,5 +140,5 @@ fn try_cheat_sheet(path: &str) -> Option<String> {
     None
 }
 
-// @SCRIPT-SIGNATURE-V1: yk-r1.ES256.20260413T002526+08:00.MEUCIQDtbn9VsvXD5i0CDDpX
-// vaa/uR8bjm5CuvKZFs9gIVFfxwIgYXGJkKom0g+uG6QB6jqi31d7Vtyg80SWmyRAi5aZCvk=
+// @SCRIPT-SIGNATURE-V1: yk-r1.ES256.20260413T003310+08:00.MEYCIQDcX8y+GB4tGpZvp0TG
+// TOk6LT/J4cFXYOYG88Q3hx4S9QIhAK2IGN/5paueKYKdqO6ikPji6N4LBf4ssbunCM87XyLS