Eek! keyboard firmware merge into QMK (#11020)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Erovia <Erovia@users.noreply.github.com>

keyboards/eek/silk_up/readme.md

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+# eek!
+
+This is the alternate layout for the eek! The silkscreen with the bat and eek! text will face up. See the picture and the flashing example.
+
+![eek_bat](https://i.imgur.com/YrOqmft.jpeg)
+ 
+Make example for this keyboard (after setting up your build environment):
+ 
+    make eek/silk_up:default
+
+Flashing example for this keyboard:
+ 
+    make eek/silk_up:default:flash
+ 

keyboards/eek/silk_up/silk_up.h

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+/* Copyright 2020 klackygears
+ *
+ * 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
+
+#include "eek.h"
+
+/* This a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+#define LAYOUT_split_3x5_3( \
+    K09, K08, K07, K06, K05,     K04, K03, K02, K01, K00, \
+    K19, K18, K17, K16, K15,     K14, K13, K12, K11, K10, \
+    K29, K28, K27, K26, K25,     K24, K23, K22, K21, K20, \
+              K37, K36, K35,     K34, K33, K32 \
+) \
+{ \
+    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09 }, \
+    { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19 }, \
+    { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29 }, \
+    { KC_NO, KC_NO, K32, K33, K34, K35, K36, K37, KC_NO, KC_NO } \
+}