Implement shutdown op for examples

examples/pods/pod-babashka-filewatcher/src/main.rs

@@ -105,6 +105,10 @@ fn handle_incoming(val: bc::Value) {
                 _ => panic!(var)
             };
         },
+        "shutdown" => {
+            // TODO: clean up stuff?
+            std::process::exit(0);
+        }
         _ => panic!(op)
     }
 }

examples/pods/pod-babashka-hsqldb/src/pod/babashka/hsqldb.clj

@@ -46,4 +46,5 @@
                       (write {"value" (pr-str (apply (lookup var) args))
                               "id" id
                               "status" ["done"]})
-                      (recur))))))))
+                      (recur))
+            :shutdown (System/exit 0)))))))

examples/pods/pod-lispyclouds-sqlite/pod-lispyclouds-sqlite.py

@@ -56,7 +56,8 @@ def main():
 
             conn.commit()
             conn.close()
-
+        elif op == "shutdown":
+            sys.exit(0)
 
 if __name__ == "__main__":
     main()