Refactor nibble / update to match build docs (#620)

* feat(nibble): add underglow support for nice_nano builds

* feat(nibble): add encoder to top, left most column to match standard assembly documentation

* refactor(nibble): add layer labels

* feat(nibble): add support for optional display ; off by default

* feat(nibble): add README

* fix(nibble): adjust oled rotation for easier reading

* fix(nibble): add additional note about enabling oled

* refactor(nibble): convert keymap to use tabs instead of spaces

* refactor(nibble): enable oled in dts/overlay by default

* refactor(nibble): cleanup alignment and formatting in nibble keymap

* refactor(nibble): re-align top most row of keymap to be sensible

* refactor(nibble): cleanup kscan map alignment

* refactor(nibble): indent first row of map/transform to properly align with physical columns

* fix(nibble): remove dangling code block from readme

Co-authored-by: KemoNine <mcrosson@kemonine.info>

app/boards/shields/nibble/Kconfig.defconfig

@@ -11,3 +11,38 @@ config ZMK_USB
 
 endif
 
+if ZMK_DISPLAY
+
+config I2C
+	default y
+
+config SSD1306
+	default y
+
+config SSD1306_REVERSE_MODE
+	default y
+
+endif # ZMK_DISPLAY
+
+if LVGL
+
+config LVGL_HOR_RES_MAX
+	default 128
+
+config LVGL_VER_RES_MAX
+	default 32
+
+config LVGL_VDB_SIZE
+	default 64
+
+config LVGL_DPI
+	default 148
+
+config LVGL_BITS_PER_PIXEL
+	default 1
+
+choice LVGL_COLOR_DEPTH
+	default LVGL_COLOR_DEPTH_1
+endchoice
+
+endif # LVGL