Add crd's XD60 ANSI keymap (#4702)

diff --git a/keyboards/xd60/keymaps/crd_ansi/README.md b/keyboards/xd60/keymaps/crd_ansi/README.md
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+++ b/keyboards/xd60/keymaps/crd_ansi/README.md
@@ -0,0 +1,52 @@
+# ANSI Layout
+
+This is the standard ANSI keymap that I use on all of my 60% boards. This keymap
+includes a single function layer available by holding the designated key on the
+bottom row.
+
+I don't ever use Caps Lock, so that keycode is not mapped anywhere. In place of
+the usual Caps Lock key, I have the following bnehaviour encoded: Escape when tapped
+and Control when held.
+
+I also have the bottom right mod cluster mapped to navigational direction keys when tapped.
+Shift = Up, Alt = Down, Ctrl = Right, Fn = Left. When held, these keys send the usual modifier
+signals.
+
+```
+/* Base layer
+ * ,-----------------------------------------------------------------------------------------.
+ * |  `  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  8  |  9  |  0  |  -  |  =  | Backspace |
+ * |-----------------------------------------------------------------------------------------+
+ * |  Tab   |  Q  |  W  |  E  |  R  |  T  |  Y  |  U  |  I  |  O  |  P  |  [  |  ]  |    \   |
+ * |-----------------------------------------------------------------------------------------+
+ * | Esc/Ctrl|  A  |  S  |  D  |  F  |  G  |  H  |  J  |  K  |  L  |  ;  |  '  |    Enter    |
+ * |-----------------------------------------------------------------------------------------+
+ * |   Shift   |  Z  |  X  |  C  |  V  |  B  |  N  |  M  |  ,  |  .  |  ?  |  Shift          |
+ * |-----------------------------------------------------------------------------------------+
+ * | Ctrl |  Alt  |  Cmd  |               Space               |  Cmd  |  Fn  |  Alt  |  Ctrl |
+ * `-----------------------------------------------------------------------------------------'
+ */
+```
+
+While holding the function key, you have access to the following layout. Any key
+not indicated is considered "transparent" and sends the signal indicated in the
+layer below. This function later gets you dedicated access to Escape and Delete
+keys, function keys on numbers, WASD directions, other navigation, multimedia
+controls, RGB (underglow) controls, and firmware reset (DFU mode).
+
+```
+/* Fn layer
+ * ,-----------------------------------------------------------------------------------------.
+ * | Esc | F1  | F2  | F3  | F4  | F5  | F6  | F7  | F8  | F9  | F10 | F11 | F12 |  Del      |
+ * |-----------------------------------------------------------------------------------------+
+ * |        | Home|  Up | End |     |     |     |     | Mute|     |     | Pg+ | Pg- | Reset  |
+ * |-----------------------------------------------------------------------------------------+
+ * |         | Left| Down|Right|     |     |     |Brt- |Vol- |Vol+ |Brt+ |     |  RGB Toggle |
+ * |-----------------------------------------------------------------------------------------+
+ * |           |     |     |     |     |     |     |     |R(Bt-)|R(Bt+)|R(Rot)|              |
+ * |-----------------------------------------------------------------------------------------+
+ * |      |       |       |                                   |       |      |       |       |
+ * `-----------------------------------------------------------------------------------------'
+ */
+
+```
\ No newline at end of file

diff --git a/keyboards/xd60/keymaps/crd_ansi/keymap.c b/keyboards/xd60/keymaps/crd_ansi/keymap.c
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+++ b/keyboards/xd60/keymaps/crd_ansi/keymap.c
@@ -0,0 +1,30 @@
+#include QMK_KEYBOARD_H
+
+enum keyboard_layers {
+  _BL = 0, // Base Layer
+  _FL     // Function Layer
+};
+
+// Custom #defined keycodes (shorter macros for readability)
+#define KC_CTES CTL_T(KC_ESC)
+#define KC_RSUP RSFT_T(KC_UP)
+#define KC_FNLT LT(_FL, KC_LEFT)
+#define KC_RADN RALT_T(KC_DOWN)
+#define KC_RCRT RCTL_T(KC_RIGHT)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+       [_BL] = LAYOUT_60_ansi(
+               KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC,
+               KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS,
+               KC_CTES, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_ENT,
+               KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSUP,
+               KC_LCTL, KC_LALT, KC_LGUI,                            KC_SPC,                             KC_RGUI, KC_FNLT, KC_RADN, KC_RCRT
+       ),
+       [_FL] = LAYOUT_60_ansi(
+               KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_DEL,
+               _______, KC_HOME, KC_UP,   KC_END,  _______, _______, _______, _______, KC_MUTE, _______, _______, KC_PGDN, KC_PGUP, RESET,
+               _______, KC_LEFT, KC_DOWN, KC_RGHT, _______, _______, KC_SLCK, KC_VOLD, KC_VOLU, KC_PAUS, _______, _______, RGB_TOG,
+               _______, _______, _______, _______, _______, _______, _______, _______, RGB_VAD, RGB_VAI, RGB_MOD, _______,
+               _______, _______,          _______,                   _______,                            _______, _______, _______, _______
+       )
+};