* + cli support on windows
- removes the preprocessor macro that prevented arg
parsing on Windows
- adds windows-cli.cpp as src for a wrapper exe
- adds flameshot-cli target into cmake when building
on Windows
- updates README
* updates PR
+ support for unicode characters in cli args
+ additional clarification in README re: flameshot-cli
+ new workaround for spaces in _popen path; works with relative output paths
* fix EOL
* updated flameshot.exe path construction
avoids using the hard-coded length of flameshot-cli.exe
* fix whitespace (clang)
