* fix: Escape paths with spaces in include list from --includes

* fix: --includes should not use shlex on Windows platforms

* Apply suggestions from code review

* fix: use custom impl

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* Support trailing backslashes

Co-authored-by: Henry Schreiner <HenrySchreinerIII@gmail.com>

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Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>
Co-authored-by: Markus Bauer <markus.bauer@cispa.saarland>
Co-authored-by: Henry Schreiner <HenrySchreinerIII@gmail.com>