Support for PC platform (#12)

* improvements for cross-platform compiling

* moved tactility-core to libs/

* splitup improvements

* remove git/gitmodules from freertos

* better platformbetter platform checks

* added build scripts

* delete mbedtls

* re-add mbedtls

* fixes and improvements

* added pc build

* simplify build scripts

* revert build scrpit

* updated builds

* fix for pc

* fix for pc

* fix for build

app-sim/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.16)
+
+file(GLOB SOURCES "src/*.c")
+add_executable(app-sim ${SOURCES})
+target_link_libraries(app-sim PRIVATE tactility-core)
+target_link_libraries(app-sim PRIVATE freertos-kernel)
+