[sup] add repo support files, README, gitignore
[add] qmc2: 'darkone' arcade theme
[sup] qmc2|darkone-arcade-theme: add screenshot of revised preferences menu
[sup] qmc2|darkone-arcade-theme: add screenshot of preference menu overhaul
[imp] qmc2|darkone-arcade-theme: update README, add usage documentation
[add] subtitleeditor: find-and-replace regex references