archetype keymap for jj50 (qmk#5397)

* archetype keymap for jj50 keyboard

* archetype keymap for jj50 keyboard

* PR fixes proposed by mechmerlin

keyboards/jj50/keymaps/archetype/README.md

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+# archetype keymap for jj50 keyboards
+A keymap that can be used with the jj50 ortholinear keyboard.
+
+## Features
+
+- `QWERTY` layout (Default)
+- `COLEMAK` layout
+- `FN` layout (various keys that are rarely needed)
+- `FX` layout (Control lighting and audio)
+- Use `Left Ctrl` and `Left Alt` to output `()`, `[]` and `{}` by tapping once, twice or thrice respectively. Hold them down for the regular keycode (LCtrl or LAlt)
+- `Right Shift` when held or Enter when tapped
+- Auto-Shift enabled (long press on alphas and numeric keys outputs shifted character)
+- Full arrow keys available
+
+
+## Feedback
+
+I made this keymap based on the existing default one. If you happen to use this keymap [drop me a line](mailto://[email protected]) about what could be improved etc
+
+Enjoy!
+
+Iason Dimitrakopoulos

keyboards/jj50/keymaps/archetype/config.h

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+#pragma once
+
+#undef AUTO_SHIFT_TIMEOUT
+#undef TAPPING_TERM
+
+#define AUTO_SHIFT_TIMEOUT 150
+#define TAPPING_TERM 150
+//#define BOOTMAGIC_KEY_SALT KC_LCTL