Add the SquishyTKL and SquishyFRL (#12764)

* Add SquishyTKL

* Add SquishyTKL-FRL

* Adjust readme.md and info.json

* Add JIS support for SquishyTKL

* Fix JIS layout macro

* Fix via layout and keymap

* Migrate SquishyTKL to STM32duino bootloader

* Make chibios conf files generic

* Change TKL via keymap to match number of layers

* Apply chibios changes to FRL as well

* Adjust README regarding flashing with dfu-util

* Add license and header guard

keyboards/ramonimbao/squishytkl/keymaps/via/config.h

@@ -0,0 +1,25 @@
+/*
+Copyright 2021 Ramon Imbao
+
+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 DYNAMIC_KEYMAP_LAYER_COUNT 1
+// Only way to get this to compile is to reduce layer count to 1.
+// Do TKL users even need more than 1 layer?
+// I'd like that option though. Below also works.
+// #define DYNAMIC_KEYMAP_LAYER_COUNT 2
+// #define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 2047