examples converted to build using XCommon CMake; rename directory example -> examples
build/run instructions in example READMEs updated
tests converted to build using XCommon CMake; rename directory test -> tests
lib_unity is used instead of the upstream Unity that was previously fetched by CMake
the changes to the tests can be hard to see in the diff because of the renamed directory
the CMakeLists.txt are a bit complicated with different compiler flags based on the compiler (xcc, gcc, msvc) but I've based this on the old flags and it's duplicated in each test app
one test app also has some Python script auto-generation that was commented out: I've recreated and tested this with XCommon CMake, but it remains commented out
native builds on Windows can't be built without compiler/linker warnings due to a limitation in XCommon CMake
legacy CMake test added to the legacy XCommon test
use preferred XN target XK-EVK-XU316 instead of XCORE-AI-EXPLORER throughout
example->examplestest->testsXK-EVK-XU316instead ofXCORE-AI-EXPLORERthroughout