…ycamel::readerwriterqueue in both subdirectory and installed cmake project (didn't change targets that were already avaible, though projectect previously didn't work as an installable cmake project) also added test targets disabled by default configurable with variable psuedo namespaced 'MOODYCAMEL_READERWRITERQUEUE_ENABLE_TESTS', test targets are unittests and stabtest, completely ignores msvc project files and make files, so no need for those going forward, and though better practice would be to change the includes to be more target friendly (not use bespoke relative includes), I decided not to change that, so the previous way to build and run the test will *also* still work. Added best pairing of MSVC equivalent compile commands I could find, and I verified all tests build and run correctly on Windows 11 with MSVC 14.38.33130

…rguments for release, debug and relwithdebinfo for tests, otherwise would force relwithdebinfo or fail to compile.

…ably not needed, believe configs add this anyway, but it doesn't hurt to add

… and relaase with debuginfo *with out* assertions running, fixed generator statements, and moved include for GNUInstallDirs so it no longer complains about it's location