Add Reticulum/LXMF integration for Home Assistant

Custom integration connecting Home Assistant to a Reticulum network over a
TCPClientInterface and exchanging LXMF messages, with an Assist conversation
bridge, notify entity, sensors (incl. interface telemetry), buttons, services,
bus events and device triggers.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

custom_components/reticulum/services.yaml

@@ -0,0 +1,62 @@
+send_message:
+  fields:
+    destination:
+      required: true
+      example: "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6"
+      selector:
+        text:
+    content:
+      required: true
+      example: "Hello from Home Assistant"
+      selector:
+        text:
+          multiline: true
+    title:
+      required: false
+      example: "Notification"
+      selector:
+        text:
+    method:
+      required: false
+      default: direct
+      selector:
+        select:
+          translation_key: delivery_method
+          options:
+            - direct
+            - opportunistic
+            - propagated
+    fields:
+      required: false
+      example: '{ }'
+      selector:
+        object:
+
+announce:
+
+request_path:
+  fields:
+    destination:
+      required: true
+      example: "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6"
+      selector:
+        text:
+
+set_propagation_node:
+  fields:
+    destination:
+      required: true
+      example: "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6"
+      selector:
+        text:
+
+sync_propagation:
+  fields:
+    max_messages:
+      required: false
+      example: 10
+      selector:
+        number:
+          min: 1
+          max: 1000
+          mode: box