Create EX4100-F-12T (#1492)

* Create EX4100-F-12T

adding the EX4100-F-12T switch 
datasheet: 
https://www.juniper.net/us/en/products/switches/ex-series/ex4100-f-line-of-ethernet-datasheet.html

photos:
https://www.juniper.net/us/en/company/images/image-library-logos-and-product-photos/products/ex4100-f-12p.html

* Update and rename EX4100-F-12T to EX4100-F-12T.yaml

fixed file extension and one typo on the part number

* Update EX4100-F-12T.yaml

edit format

* Update EX4100-F-12T.yaml

I am fixing the formatting, removing ' from the comments.

---------

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

device-types/Juniper/EX4100-F-12T.yaml

@@ -0,0 +1,59 @@
+---
+manufacturer: Juniper
+model: EX4100-F-12T
+slug: juniper-ex4100-f-12t
+u_height: 1
+part_number: EX4100-F-12t
+is_full_depth: false
+airflow: passive
+weight: 5.95
+weight_unit: lb
+comments: https://www.juniper.net/us/en/company/images/image-library-logos-and-product-photos/products/ex4100-f-12p.html
+interfaces:
+  - name: ge-0/0/0
+    type: 1000base-t
+  - name: ge-0/0/1
+    type: 1000base-t
+  - name: ge-0/0/2
+    type: 1000base-t
+  - name: ge-0/0/3
+    type: 1000base-t
+  - name: ge-0/0/4
+    type: 1000base-t
+  - name: ge-0/0/5
+    type: 1000base-t
+  - name: ge-0/0/6
+    type: 1000base-t
+  - name: ge-0/0/7
+    type: 1000base-t
+  - name: ge-0/0/8
+    type: 1000base-t
+  - name: ge-0/0/9
+    type: 1000base-t
+  - name: ge-0/0/10
+    type: 1000base-t
+  - name: ge-0/0/11
+    type: 1000base-t
+  - name: xe-0/1/0
+    type: 10gbase-x-sfpp
+  - name: xe-0/1/1
+    type: 10gbase-x-sfpp
+  - name: xe-0/1/2
+    type: 10gbase-x-sfpp
+  - name: xe-0/1/3
+    type: 10gbase-x-sfpp
+  - name: mge-0/2/0
+    type: 10gbase-t
+  - name: mge-0/2/1
+    type: 10gbase-t
+  - name: me0
+    type: 1000base-t
+    mgmt_only: true
+power-ports:
+  - name: PSU0
+    type: dc-terminal
+console-ports:
+  - name: Console
+    type: rj-45
+  - name: Console (USB)
+    type: usb-c