Notion RTL per Fahmi, Omar Bahareth

Adds preliminary support for Right-to-left (RTL) on Notion (https://notion.so) as a workaround until Notion natively supports it. This is still the initial version and may behave unexpectedly. (Nothing fancy is happening, just adding a dir="auto" on all top-level blocks)

Supported block types:
- Title
- Text
- Lists
- To do lists

Supported database types:
- Tables
- Galleries
- Boards

This extension is open source and if you believe you can improve, you're more than welcome.