Create RS816.yaml (#1757)

* Create RS816.yaml

* Update RS816.yaml

* Update RS816.yaml

* Update RS816.yaml

Added weight definition per the datasheet

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Co-authored-by: Daniel W. Anner <daniel.anner@danstechsupport.com>

device-types/Synology/RS816.yaml

@@ -0,0 +1,22 @@
+---
+manufacturer: Synology
+model: RS816
+slug: synology-rs816
+part_number: RS816
+u_height: 1.0
+is_full_depth: true
+weight: 4.34
+weight_unit: kg
+console-ports:
+  - name: Console
+    type: de-9
+power-ports:
+  - name: PSU 1
+    type: iec-60320-c14
+interfaces:
+  - name: Ethernet 1
+    type: 1000base-t
+    mgmt_only: false
+  - name: Ethernet 2
+    type: 1000base-t
+    mgmt_only: false