add hints

Author: silvekkk

crates/forge/src/result.rs

@@ -192,6 +192,14 @@ impl TestOutcome {
             successes.to_string().green()
         )?;
 
+        // Show helpful next steps for failed tests
+        sh_println!("\n💡 Next steps:")?;
+        sh_println!("  • Rerun only failed tests: forge test --rerun")?;
+        sh_println!("  • Debug specific test: forge test --debug --match-test <test_name>")?;
+        sh_println!("  • Watch mode with smart rerun: forge test --watch --rerun-failed")?;
+        sh_println!("  • View detailed traces: forge test -vvv --match-test <test_name>")?;
+        sh_println!("  • Run specific test: forge test --match-test <test_name>")?;
+
         // TODO: Avoid process::exit
         std::process::exit(1);
     }