Move the HostOS plugin into the plugins directory

examples/Features/HostOS/Makefile

@@ -0,0 +1,48 @@
+# This makefile for a Kaleidoscope sketch pulls in all the targets
+# required to build the example
+
+
+
+
+ifneq ($(KALEIDOSCOPE_DIR),)
+search_path += $(KALEIDOSCOPE_DIR)
+endif
+
+ifneq ($(ARDUINO_DIRECTORIES_USER),)
+search_path += $(ARDUINO_DIRECTORIES_USER)/hardware/keyboardio/avr/libraries/Kaleidoscope
+endif
+
+ifeq ($(shell uname -s),Darwin)
+search_path += $(HOME)/Documents/Arduino/hardware/keyboardio/avr/libraries/Kaleidoscope
+else
+search_path += $(HOME)/Arduino/hardware/keyboardio/avr/libraries/Kaleidoscope
+endif
+
+sketch_makefile := etc/makefiles/sketch.mk
+
+$(foreach candidate, $(search_path), $(if $(wildcard $(candidate)/$(sketch_makefile)), $(eval ks_dir ?= $(candidate))))
+
+ifneq ($(ks_dir),)
+
+$(info Using Kaleidoscope from $(ks_dir))
+
+export KALEIDOSCOPE_DIR := $(ks_dir)
+include $(ks_dir)/$(sketch_makefile)
+
+else
+
+$(info I can't find your Kaleidoscope installation.)
+$(info )
+$(info I tried looking in:)
+$(info )
+$(foreach candidate, $(search_path), $(info $(candidate)))
+$(info )
+$(info The easiest way to fix this is to set the 'KALEIDOSCOPE_DIR' environment)
+$(info variable to the location of your Kaleidoscope directory.)
+
+endif
+
+
+null-target:
+	$(info You should never see this message)
+	@:

plugins/Kaleidoscope-HostOS/library.properties

@@ -0,0 +1,2 @@
+name=Kaleidoscope-HostOS
+version=0.0.0