feat(waypoint): Waypoint creation/deletion

Add methods to send (create or move), delete waypoint.
Add an example script to create, move, delete waypoint.

examples/waypoint.py

@@ -0,0 +1,56 @@
+"""Program to create and delete waypoint
+   To run:
+   python3 examples/waypoint.py --port /dev/ttyUSB0 create 45 test the_desc_2 '2024-12-18T23:05:23' 48.74 7.35
+   python examples/waypoint.py delete 45
+"""
+
+import argparse
+import datetime
+import sys
+import time
+
+import meshtastic
+import meshtastic.serial_interface
+
+parser = argparse.ArgumentParser(
+                    prog='waypoint',
+                    description='Create and delete Meshtastic waypoint')
+parser.add_argument('--port', default=None)
+parser.add_argument('--debug', default=False, action='store_true')
+
+subparsers = parser.add_subparsers(dest='cmd')
+parser_delete = subparsers.add_parser('delete', help='Delete a waypoint')
+parser_delete.add_argument('id', help="id of the waypoint")
+
+parser_create = subparsers.add_parser('create', help='Create a new waypoint')
+parser_create.add_argument('id', help="id of the waypoint")
+parser_create.add_argument('name', help="name of the waypoint")
+parser_create.add_argument('description', help="description of the waypoint")
+parser_create.add_argument('expire', help="expiration date of the waypoint as interpreted by datetime.fromisoformat")
+parser_create.add_argument('latitude', help="latitude of the waypoint")
+parser_create.add_argument('longitude', help="longitude of the waypoint")
+
+args = parser.parse_args()
+print(args)
+
+# By default will try to find a meshtastic device,
+# otherwise provide a device path like /dev/ttyUSB0
+if args.debug:
+    d = sys.stderr
+else:
+    d = None
+with meshtastic.serial_interface.SerialInterface(args.port, debugOut=d) as iface:
+    if args.cmd == 'create':
+        p = iface.sendWaypoint(
+            id=int(args.id),
+            name=args.name,
+            description=args.description,
+            expire=int(datetime.datetime.fromisoformat(args.expire).timestamp()),
+            latitude=float(args.latitude),
+            longitude=float(args.longitude),
+        )
+    else:
+        p = iface.deleteWaypoint(int(args.id))
+    print(p)
+
+# iface.close()