Added WireViz diagram YAMLs for middle encoder cable and corner exten…

…sions

Added images of connectors

electrical/wiring/encoder_extension.yml

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+connectors:
+  DuPont:
+    <<: *maleDP4
+  Encoder-JST: 
+    <<: *jst_xh4
+
+cables:
+  W1: 
+    <<: *enc
+    length: 36 cm
+
+connections:
+  - 
+    - DuPont: [1-4]
+    - W1: [1-4]
+    - Encoder-JST: [4-1]
+
+metadata:
+  title: Corner Encoder Extension Cable (x4)

electrical/wiring/middle_encoder.yml

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+connectors:
+  Molex-to-PCB:
+    <<: *molex
+  M+-to-Molex:
+    <<: *bullet
+    pinlabels: [M+]
+  M--to-Molex:
+    <<: *bullet
+    pinlabels: [M-]
+  Encoder-to-Molex: 
+    <<: *jst_xh4
+
+cables:
+  W1: 
+    <<: *motor
+    length: 3 cm
+
+  W2: 
+    <<: *enc
+    length: 44 cm
+
+connections:
+  - 
+    - Molex-to-PCB: [1]
+    - W1: [1]
+    - M+-to-Molex: [1]
+  - 
+    - Molex-to-PCB: [2]
+    - W1: [2] 
+    - M--to-Molex: [1]
+  -
+    - Molex-to-PCB: [4, 3, 5, 6]
+    - W2: [1-4]
+    - Encoder-to-Molex: [4, 3, 2, 1]
+
+metadata:
+  title: Middle Encoder Cable (x2)

electrical/wiring/templates.yml

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+templates:
+  Molex-to-PCB: &molex
+    type: Molex Mini-Fit Jr.
+    subtype: female
+    pinlabels: [M+, M-, G, 5V, EnA, EnB]
+    show_pincount: true
+    image:
+      src: ./images/Molex-Mini-Fit-Jr-6-pin.png
+      caption: Molex Pinout
+      width: 165
+  Motor-to-Molex: &bullet
+    type: Bullet
+    show_pincount: false
+    #image: images/Bullet_Connector.jpg
+  Male-DuPont-4pin: &maleDP4
+    type: DuPont
+    subtype: male
+    pinlabels: [5V, GND, EnA, EnB]
+    show_pincount: true
+    image:
+      src: ./images/dupont.png
+      caption: Dupont Pinout
+      width: 500
+      height: 200
+  Female-DuPont-4pin: &femDP4
+    type: DuPont
+    subtype: female
+    pinlabels: [5V, GND, EnA, EnB]
+    show_pincount: true
+  Male-DuPont-3pin: &maleDP3
+    type: DuPont
+    subtype: male
+    pinlabels: [PWM, +, GND]
+    show_pincount: true
+  Female-DuPont-3pin: &femDP3
+    type: DuPont
+    subtype: female
+    pinlabels: [PWM, +, GND]
+    show_pincount: true
+  JST-XH: &jst_xh4
+    type: JST-XH
+    subtype: female
+    pinlabels: [EnB, EnA, GND, 5V]
+    image:
+      src: ./images/JST-XH.png
+      caption: JST-XH Pinout
+      width: 231
+      height: 202
+  Encoder: &enc
+    colors: [RD, BK, BU, WH]
+    gauge: 22 awg
+  Servo: &servo
+    colors: [WH, RD, BK]
+    gauge: 20 awg
+  Motor: &motor
+    colors: [RD, BK]
+    gauge: 18 awg 
+