[espnow] Add transport platform for packet_transport (#11025)

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Co-authored-by: J. Nick Koston <nick@koston.org>

tests/components/espnow/common.yaml

@@ -1,4 +1,5 @@
 espnow:
+  id: espnow_component
   auto_add_peer: false
   channel: 1
   peers:
@@ -50,3 +51,26 @@ espnow:
           - format_mac_address_pretty(info.src_addr).c_str()
           - format_hex_pretty(data, size).c_str()
           - info.rx_ctrl->rssi
+
+packet_transport:
+  - platform: espnow
+    id: transport1
+    espnow_id: espnow_component
+    peer_address: "FF:FF:FF:FF:FF:FF"
+    encryption:
+      key: "0123456789abcdef0123456789abcdef"
+    sensors:
+      - temp_sensor
+    providers:
+      - name: test_provider
+        encryption:
+          key: "0123456789abcdef0123456789abcdef"
+
+sensor:
+  - platform: internal_temperature
+    id: temp_sensor
+
+  - platform: packet_transport
+    provider: test_provider
+    remote_id: temp_sensor
+    id: remote_temp