feat(video-clips): replace hardcoded colors with config's theme colors

app/Libraries/MediaClipper/Config/MediaClipper.php

app/Libraries/MediaClipper/VideoClip.php

app/Libraries/MediaClipper/quotes.png

app/Resources/icons/clapperboard.svg

modules/Admin/Config/Routes.php

modules/Admin/Controllers/VideoClipsController.php

modules/Admin/Language/en/EpisodeNavigation.php

modules/Admin/Language/fr/EpisodeNavigation.php

themes/cp_admin/episode/_sidebar.php

themes/cp_admin/episode/video_clips_list.php

themes/cp_admin/episode/video_clips_new.php