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

run.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+if [[ -v ESP_IDF_VERSION ]]; then
+  idf.py flash monitor $@
+else
+  cmake -S ./ -B build-sim
+  cmake --build build-sim
+  build-sim/app-sim/app-sim
+fi
+