feat(Crunchyroll): add series page support and multiples fix

[RisingSunLight42]

Description

Changelog

• Remove useless await in front of strings variable
• Resolves #6635 by correcting wrong querySelectors.
• Fix the whole manga part by correcting querySelectors.
• Add support for the "series" page when you're viewing an anime page for example on the beta version of the website.
• Change if statement for the showCover setting, now at the end of the file.
• Add multiple location variable like href and pathname to avoid repetition.
• Remove useless checks
• Simplification of some code parts

Acknowledgements

• [x] I read the Presence Guidelines
• [x] I linted the code by running yarn format
• [x] The PR title follows the repo's commit conventions

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