[Keyboard] Add Deemen17 DE60FS (#22667)

* Add de60fs

* Update

* Add image

* Add line break for rules.mk

* Update keyboards/deemen17/de60fs/keymaps/default/keymap.c

Co-authored-by: Less/Rikki <86894501+lesshonor@users.noreply.github.com>

* Update keyboards/deemen17/de60fs/info.json

Co-authored-by: Less/Rikki <86894501+lesshonor@users.noreply.github.com>

* Remove readme of keymap folder

* Change to KC_RSFT

* Add Community Layout support

Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

* Update keyboards/deemen17/de60fs/info.json

Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

* Update keyboards/deemen17/de60fs/keymaps/default/keymap.c

Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

* Update keyboards/deemen17/de60fs/keymaps/via/keymap.c

Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

* Add description in readme

---------

Co-authored-by: Less/Rikki <86894501+lesshonor@users.noreply.github.com>
Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

keyboards/deemen17/de60fs/config.h

@@ -0,0 +1,22 @@
+/* Copyright 2023 Deemen17 <https://github.com/Deemen17>
+ *
+ * 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 RP2040_BOOTLOADER_DOUBLE_TAP_RESET
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT 500U
+
+#define RP2040_FLASH_GENERIC_03H