[Keyboard] Add support for Drink Me (#8039)

* Add initial configuration and keymaps for Yatara Drink Me.

* Apply suggestions from code review

* Apply suggestions from code review

* Add transparent layers in VIA layout so there are four layers in total. Amend closing bracket indentation in keymap.c files.

3 files changed, 22 insertions, 0 deletions

diff --git a/keyboards/yatara/drink_me/keymaps/dormouse/keymap.c b/keyboards/yatara/drink_me/keymaps/dormouse/keymap.c
new file mode 100644
index 0000000000..e2d29a026a
--- /dev/null
+++ b/keyboards/yatara/drink_me/keymaps/dormouse/keymap.c
@@ -0,0 +1,10 @@
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT(
+        KC_SLEP,
+        KC_MUTE,
+        KC_VOLD,
+        KC_VOLU
+    )
+};
diff --git a/keyboards/yatara/drink_me/keymaps/dormouse/readme.md b/keyboards/yatara/drink_me/keymaps/dormouse/readme.md
new file mode 100644
index 0000000000..1a8c854d44
--- /dev/null
+++ b/keyboards/yatara/drink_me/keymaps/dormouse/readme.md
@@ -0,0 +1,11 @@
+# Drink Me - Dormouse layout
+
+> The Dormouse slowly opened his eyes. ‘I wasn’t asleep,’ he said in a hoarse, feeble voice: ‘I heard every word you fellows were saying.’
+
+Sleep and volume control.
+
+![Drink Me - Default layout](https://i.imgur.com/VQXH512.png)
+
+```
+Sleep, Mute, Volume down, Volume up
+```
diff --git a/keyboards/yatara/drink_me/keymaps/dormouse/rules.mk b/keyboards/yatara/drink_me/keymaps/dormouse/rules.mk
new file mode 100644
index 0000000000..fcfd2225bc
--- /dev/null
+++ b/keyboards/yatara/drink_me/keymaps/dormouse/rules.mk
@@ -0,0 +1 @@
+EXTRAKEY_ENABLE = yes