feat: Add Celluloid support (with ani-skip)

[Vvamp]

Type of change

• [ ] Bug fix
• [X] Feature
• [ ] Documentation update

Description

Celluloid is a popular MPV frontend. Since celluloid can pass mpv arguments by using a 'mpv-' prefix in the command args, I figured it'd be easy to add. It just uses mpv on the backend after all.

I opted for not adding a new case in the switch, but instead adding the "celluloid" pattern in the mpv option. I then added an optional prefix, which is set if the player is celluloid. It could be done as a seperate option, but I wanted to prevent duplicate code.

I bumped the version to 4.10.0 as I noticed that is what you guys were aiming for in the next release. I checked 'range selection' as working, as you guys are already aware of the pre-existing bug with range selection and it's not related to this PR. The readme and help still mention that --skip only works with mpv, but since celluloid is still just mpv, I thought it was still correct.

Note: To make this work the user would have to copy ani-skip's skip.lua to the scripts folder under ~/.config/celluloid/scripts/ instead of ~/.config/mpv/scripts/.

Checklist

• [X] any anime playing
• [X] bumped version

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• [X] next, prev and replay work
• [X] -c history and continue work
• [X] -d downloads work
• [X] -s syncplay works
• [X] -q quality works
• [X] -v vlc works
• [X] -e select episode works
• [X] -S select index works
• [X] -r range selection works
• [X] --skip ani-skip works
• [X] --skip-title ani-skip title argument works
• [X] --no-detach no detach works
• [X] --dub and regular (sub) mode both work
• [X] all providers return links (not necessarily on a single anime, use debug mode to confirm)

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• [X] -h help info is up to date
• [X] Readme is up to date
• [X] Man page is up to date