[Keymap] emp keymap for keebio/iris (#16858)

* added new layout for keebio/iris

* Update keyboards/keebio/iris/keymaps/emp/config.h

* Update keyboards/keebio/iris/keymaps/emp/keymap.c

Replace #defines with enum

* Update keyboards/keebio/iris/keymaps/emp/keymap.c

Made requested changes about formatting and the license.

* Update config.h

Cleaned up formatting

* Update keyboards/keebio/iris/keymaps/emp/keymap.c

Small changes to improve readability:
* changed whitespace in license
* added more whitespace around if/else blocks
* fixed bracket style in places

keyboards/keebio/iris/keymaps/emp/config.h

@@ -0,0 +1,97 @@
+/*
+Copyright 2017 Danny Nguyen <danny@keeb.io>
+
+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
+
+/* Use I2C or Serial, not both */
+#undef USE_I2C
+#define USE_SERIAL
+
+/* Select hand configuration */
+#undef MASTER_LEFT
+#undef MASTER_RIGHT
+#define EE_HANDS
+
+/* disable debugging features */
+#ifndef NO_DEBUG
+#define NO_DEBUG
+#endif // #ifndef NO_DEBUG
+
+/* disable printing features */
+#ifndef NO_PRINT
+#define NO_PRINT
+#endif // #ifndef NO_PRINT
+
+/* force n-key rollover to be enabled every boot */
+#undef FORCE_NKRO
+
+/* disable tap dance and other tapping features */
+#undef NO_ACTION_TAPPING
+
+/* disable one-shot modifiers */
+#undef NO_ACTION_ONESHOT
+
+/* PERMISSIVE_HOLD
+ * when on: tap-hold keys are held when typed fast, so long as the modifier key
+ *          is pressed before and released after the rodified key(s)
+ * when off: tap-hold keys are both tapped when typed fast (within tapping term)
+ */
+#undef PERMISSIVE_HOLD
+
+/* IGNORE_MOD_TAP_INTERRUPT
+ * when on: rolling tap-hold keys taps all keys
+ * when off: rolling tap-hold keys modifies keys
+*/
+#undef IGNORE_MOD_TAP_INTERRUPT
+
+/* TAPPING_TERM x (ms)
+ * how long before a tap becomes a hold. if set above 500, a key tapped during
+ * the tapping term will turn it into a hold too
+ */
+#define TAPPING_TERM 200
+
+/* TAPPING_TOGGLE x (count)
+ * If you hold a TT key down, layer is activated, and then is de-activated when
+ * you let go (like MO()). If you repeatedly tap it, the layer will be toggled
+ * on or off (like TG()). It needs 5 taps by default, but you can change this by
+ * defining TAPPING_TOGGLE to another number.
+ */
+// #define TAPPING_TOGGLE 1
+
+/* RETRO_TAPPING
+ * tap anyway, even after TAPPING_TERM, if there was no other key interruption
+ * between press and release
+ */
+#undef RETRO_TAPPING
+
+/* ONESHOT_TIMEOUT x (ms)
+ * how long before oneshot times out
+ */
+// #define ONESHOT_TIMEOUT 2000
+
+/* TAP_CODE_DELAY x (ms)
+ * how long tapped keycodes are held down for
+ */
+// #define TAP_CODE_DELAY 100
+
+/* NO_USB_STARTUP_CHECK
+ * according to:
+ * https://github.com/qmk/qmk_firmware/issues/12732
+ * defining this can help with boards not being recognized by virtual keymapping
+ * software
+ */
+#define NO_USB_STARTUP_CHECK