Add toggle option to disable JS/CSS injection in reading mode

[Palloxin]

Describe your suggested feature

As the title says. Also put the toggle option here:

Why

Sometimes i need to see what is the original text without the JS injected and to do so i have to do the cumbersome activity of exiting reading mode => go settings => open reader settings => open JS editor => select all, Cut and then Save => exit setting => resume previous chapter => check original content ==> THEN repeat the first steps to restore the JS previously injected. See? just reading it is annoying.

Other details

JS and CSS button separated.

Acknowledgements

• [X] I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open or closed issue.
• [X] I have written a short but informative title.
• [X] If this is an issue with a source, I should be opening an issue in the sources repository.
• [X] I have updated the app to version 1.1.14.
• [X] I will fill out all of the requested information in this form.