Add "continue reading"

[Draconov]

Describe your suggested feature

It would be cool if we could continue reading last opened manga's chapter by long-holding a category switcher.

Other details

No response

Acknowledgements

• [X] I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.
• [X] I have written a short but informative title.
• [X] If this is an request for a feature in the original Tachiyomi, I am opening because multiple versions of TachiyomiJ2K have been released without this feature.
• [X] If this is an issue with an extension, or a request for an extension, I should be opening an issue in the extensions repository.
• [X] I have updated the app to version 1.7.4.
• [X] I have checked through the app settings for my feature.
• [ ] I have admitted that I am a clown by having checked this box, as I have not read these acknowledgements.
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