Add Zyxel VMG1312-B10A (#1105)

* Add Zyxel VMG1312-B10A

* Correct interface type

* Correct part number

* keep forgetting numbers must be "stringyfied"

* Add weight info

* Add weight info

* Correct yaml

* Update VMG1312-B10A.yaml

---------

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

device-types/Zyxel/VMG1312-B10A.yaml

@@ -0,0 +1,35 @@
+---
+manufacturer: Zyxel
+model: VMG1312-B10A
+slug: zyxel-vmg1312-B10A
+part_number: "402444"
+u_height: 0
+weight:
+  - value: 245
+    unit: g
+is_full_depth: false
+airflow: passive
+comments: "[VMG1312-B series specs](https://service-provider.zyxel.com/global/en/products/dsl-cpe/vdsl/modemresidential-gateways/vmg1312-b-series)"
+power-ports:
+  - name: Power
+    type: dc-terminal
+    maximum_draw: 12
+    description: 12 V DC, 1 A
+interfaces:
+  - name: DSL
+    label: DSL
+    type: xdsl
+  - name: LAN1
+    label: LAN 1
+    type: 100base-tx
+  - name: LAN2
+    label: LAN 2
+    type: 100base-tx
+  - name: LAN3
+    label: LAN 3
+    type: 100base-tx
+  - name: LAN4
+    label: LAN 4
+    type: 100base-tx
+  - name: WiFi
+    type: ieee802.11n