[Keyboard] Add Hillside 46 (#17968)

* 46: Copy from 52 and file rename

* 46: File internals refer to 46, not 52

* 46: Board remove row

* 46: Keymap: Lshift becomes ctrl, Rshift a symbol

- ESC and CAPs on upper thumbs
- AltGr and App on upper thumbs
- Page up/down on upper thumbs
- F11, F12 and mods for them on adjust

* 46: Readme update for json script, tweaks

* 46: Board fix LED count

* 46: Keymap: Arrows right, symmetric layer keys

* 46: Readme: Image link with and w/o outer pinkie

* 46: Keymap: link fixed image of nav layer

* 46: Keymap: fix reaching adj layer

Co-authored-by: mmccoyd <mmccoyd@cs.berkley.edu>

1 files changed, 25 insertions, 0 deletions

diff --git a/keyboards/handwired/hillside/46/keymaps/default_dot_c/readme.md b/keyboards/handwired/hillside/46/keymaps/default_dot_c/readme.md
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index 0000000000..564691d611
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+# Default Hillside 46 Layout (in .c format)
+
+This layout is for those who prefer defining their layout in a keymap.c,
+  instead of graphically with a keymap.json.
+It is the same as the [default keymap.json layout](https://github.com/qmk/qmk_firmware/blob/master/keyboards/handwired/hillside/46/keymaps/default),
+  except for having only a QWERTY base layer.
+  
+The make and flash commands are
+
+```
+make handwired/hillside/46:default_dot_c
+make handwired/hillside/46:default_doc_c:flash
+
+```
+
+It also serves as a simple, clean layout 
+  to verify that the configuration and switches work.
+Use the [QMK Configurator Tester](https://config.qmk.fm/#/test) 
+ to see that the switches produce output.
+All the keys should register on the layout tester 
+  except for the caps word and the two layer keys.
+The LEDs should glow a nice red.
+If they do not, you may need to clear the persistent EEPROM settings with the
+  EE_CLR key on the adjust layer,
+  or enable them with the RGB_TOG key.