introduce framework class, introduce autodelete announcement on shutdown

nostr_dvm/framework.py

@@ -0,0 +1,29 @@
+import os
+import signal
+import time
+
+
+class DVMFramework:
+    dvms = []
+
+    def __init__(self):
+        self.dvms = []
+
+
+    def add(self, dvm):
+        self.dvms.append(dvm)
+
+    def run(self):
+        for dvm in self.dvms:
+            dvm.run()
+
+        try:
+            while True:
+                time.sleep(0.1)
+        except KeyboardInterrupt:
+            for dvm in self.dvms:
+                dvm.join()
+        print("All DVMs shut down.")
+        os.kill(os.getpid(), signal.SIGKILL)
+        exit(1)
+