[Keymap] Add davidrambo lulu keymap (#19448)

Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/boardsource/lulu/keymaps/davidrambo/config.h

@@ -0,0 +1,31 @@
+/* Copyright 2022 Cole Smith <cole@boardsource.xyz>
+ * Copyright 2022 David Rambo <davidrambo@mailfence.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define MASTER_RIGHT
+#define DOUBLE_TAP_SHIFT_TURNS_ON_CAPS_WORD
+#define CAPS_WORD_IDLE_TIMEOUT 3000  // 3 seconds.
+
+#define TAPPING_TERM 210
+/*#define PERMISSIVE_HOLD*/
+#define IGNORE_MOD_TAP_INTERRUPT
+#define TAPPING_FORCE_HOLD
+
+#ifdef RGB_MATRIX_ENABLE
+    #define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
+#endif