[Keymap] new murphpad landscape keymap with encoder enhanced functions (#14103)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Jonavin <=>

keyboards/mechwild/murphpad/keymaps/jonavin/readme.md

@@ -0,0 +1,65 @@
+Jonavin's Custom MurphPad Landscape Layout
+ 
+This allows you to use Murphpad in a horizontal/landscape orientation with extra layers
+
+    - OLED has been rotated for landscape mode 
+    - Keymap positions have been updated so it's easier to visualize the keymap in landscape 
+
+        [_BASE] = LAYOUT_landscape(
+            TT(_FN1), TT(_FN2), KC_MUTE,
+
+        KC_NLCK,  KC_PSLS,  KC_PAST, KC_PMNS, KC_PPLS,      KC_BSPC,
+        KC_TAB,   KC_P7,    KC_P8,   KC_P9,   KC_PDOT,      KC_RGUI,
+        KC_RSFT,  KC_P4,    KC_P5,   KC_P6,   KC_COMMA,     KC_RCTL,
+        KC_P0,    KC_P1,    KC_P2,   KC_P3,   KC_PENT,      KC_RALT,
+
+                    _______, _______, _______
+        ),
+
+NOTE:  VIA is enabled, but it will show it in the normal orientation until I build a landscape layout version
+
+Special Features
+  - FN1 layer has encoder selectable key codes and displayed on OLED
+        
+        Change these in keymap.c to assign your desired key selection
+
+        static const keycodedescType PROGMEM keyselection[] = {
+            // list of key codes that will be scrollled through by encoder and description
+                {"TASK",    KC_TASK},
+                {"INS",     KC_INS},
+                {"DEL",     KC_DEL},
+                {"PrtSc",   KC_PSCR},
+                {"ScrLk",   KC_SCLN},
+                {"Break",   KC_PAUS},
+                {"C-A-D",   KC_CAD},  // Ctrl-Alt-Del
+                {"AltF4",   KC_AF4},
+                {"PLAY",    KC_MEDIA_PLAY_PAUSE},
+                {"RESET",   RESET},  // firmware flash mode
+          };
+
+  - Additional encoder functionality
+    - While holding R Shift, changes layers
+    - While holding R Ctrl, navigates next or previous word
+    - While holding R Alt, media next track or previous track
+    - Otherwise change volume up/dn
+
+
+rules.mk OPTIONS - Active features from userspace
+
+    - STARTUP_NUMLOCK_ON = yes
+        - turns on NUMLOCK by default
+
+DEFAULT MAPPING
+
+![image](https://user-images.githubusercontent.com/71780717/131718965-b20afef6-3bc5-49e4-952f-5755a9d6d539.png)
+
+
+FN1 Layer 1
+
+![image](https://user-images.githubusercontent.com/71780717/131719025-d41cbcd9-80b1-4a0a-abb5-55d878752dc6.png)
+
+
+RGB Layer 5 - Use Shift+Encoder to get to RGB layer 5
+
+![image](https://user-images.githubusercontent.com/71780717/131719492-e2d05a75-3a7a-48ca-94a3-faa3ff891914.png)
+