refactor(webview): re-enable webview renderer

[Ashinch]

WebView remains the most stable rendering solution, and we should re-enable it, although some compatibility work still needs to be done between it and Compose.

• Apply preference styles
• Apply custom reading font
• Support RTL languages
• Pictures can be scaled and saved
• Proxy image (use Referer header)
• Support Bionic Reading
• Support video

[aualbert]

Great work! Here are some comments:

• The scrollbar now behaves much better, but there is still a jump at the beginning. I guess this is due to title component before the actual content of the article. Could this be fixed quickly?
• Math behaves a bit better, but i'll still try to add Katex in the webview. I can do this after this is merged. I'll ask a relevant question here: is it better to include the relevant Katex files in the project resources, or to write a task to add these files at build time only along the other generated ressources?