Add Alpha3 pump component (#3787)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

tests/test1.yaml

@@ -325,6 +325,7 @@ ble_client:
             accept: True
   - mac_address: C4:4F:33:11:22:33
     id: my_bedjet_ble_client
+
 bedjet:
   - ble_client_id: my_bedjet_ble_client
     id: my_bedjet_client
@@ -1269,6 +1270,16 @@ sensor:
     pressure:
       name: "MPL3115A2 Pressure"
     update_interval: 10s
+  - platform: alpha3
+    ble_client_id: ble_foo
+    flow:
+      name: "Radiator Pump Flow"
+    head:
+      name: "Radiator Pump Head"
+    power:
+      name: "Radiator Pump Power"
+    speed:
+      name: "Radiator Pump Speed"
   - platform: ld2410
     moving_distance:
       name: "Moving distance (cm)"