Add _33 Keyboard folder (#8543)

* Add _33 Keyboard folder

* Correcting naming convetions and other code convetions

* Removed extra spaces

* fixed layout callbacks to new lower-case versions

* Remove tapping_term, fix RGB pin define. Added blank readme-to be updated.

* initial addition of the readme.md

* Update readme.md for hardware/pcb availability info

* Adding keymap readme

* Info.json added

* Incorporate Drashna's recommended changes

keyboards/underscore33/keymaps/default/keymap.c

@@ -0,0 +1,44 @@
+#include QMK_KEYBOARD_H
+
+enum layers{
+  _BASE,
+  _NUM_SYM,
+  _NAV
+};
+
+enum custom_keycodes{
+  RGBRST = SAFE_RANGE,
+};
+
+#define KC_NUM_SPC LT(_NUM_SYM, KC_SPC)
+#define KC_GA LGUI_T(KC_A)
+#define KC_AS LALT_T(KC_S)
+#define KC_CD LCTL_T(KC_D)
+#define KC_SF LSFT_T(KC_F)
+#define KC_SJ RSFT_T(KC_J)
+#define KC_CK RCTL_T(KC_K)
+#define KC_AL RALT_T(KC_L)
+#define KC_GSCLN RGUI_T(KC_SCLN)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [_BASE] = LAYOUT_33_split_space(
+    KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_Y,   KC_U,    KC_I,   KC_O,     KC_P,
+   KC_GA,  KC_AS,  KC_CD,  KC_SF,   KC_G,   KC_H,  KC_SJ,   KC_CK,  KC_AL, KC_GSCLN,
+    KC_Z,   KC_X,   KC_C,   KC_V,   KC_B,   KC_N,   KC_M, KC_COMM, KC_DOT,  KC_SLSH,
+                 KC_LCTL, KC_LALT, KC_NUM_SPC, MO(_NAV), KC_RGUI
+  ),
+
+  [_NUM_SYM] = LAYOUT_33_split_space(
+       KC_1,     KC_2,     KC_3,     KC_4,      KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,
+    KC_EXLM,    KC_AT,  KC_HASH,   KC_DLR,   KC_PERC,  KC_CIRC,  KC_AMPR,  KC_ASTR, KC_EQUAL,  KC_MINS,
+    KC_BSLS,  KC_LCBR,  KC_LBRC,  KC_LPRN,   KC_UNDS,  KC_RPRN,  KC_RBRC,  KC_RCBR,   KC_DOT,   KC_GRV,
+                  KC_TRNS,   KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS
+  ),
+
+  [_NAV] = LAYOUT_33_split_space(
+      RESET,   RGBRST,  AG_NORM,  AG_SWAP,  DEBUG,   KC_GRV,  KC_PGDN,    KC_UP,  KC_PGUP,  KC_SCLN,
+    RGB_TOG,  RGB_HUI,  RGB_SAI,  RGB_VAI,  KC_NO,  KC_HOME,  KC_LEFT,  KC_DOWN,  KC_RGHT,   KC_END,
+    RGB_MOD,  RGB_HUD,  RGB_SAD,  RGB_VAD,  KC_NO,  KC_MINS,    KC_RO,  KC_COMM,   KC_DOT,  KC_BSLS,
+                   KC_TRNS,  KC_TRNS,  KC_TRNS, KC_TRNS,   KC_TRNS
+  ),
+};

keyboards/underscore33/keymaps/default/readme.md

@@ -0,0 +1,5 @@
+![_33 layout Image](https://i.imgur.com/1vxmk0F.png)
+
+# Default _33 Layout
+
+This is the recommended default layout. It is not a fully functional layout without backspace, tab, esc and so on. It is recommended to use combos to access the additional modifiers when using the large spacebar layout option, however combos are not enabled in the default firmware.