- Tweak loading page for better usability and match the Godot
editor style guide (e.g. buttons use Title Case text).
- Update theming to match the default theme as of Godot 4.6.
- Use Inter font with OpenType features to match the Godot 4.6 default.
- Use `:focus-visible` in CSS to hide focus outlines on mouse/touch
input (matches Godot 4.6+ behavior).
- Remove video driver selection, as only WebGL 2 is available.
- Fix Open Graph image being 404 by using the same image as the
website's homepage.
- Tweak welcome dialog text and add a link to the editor download page.
- Hide "(Try this for example)" link once a file is selected.
- Fix Open Graph image being 404.
- Link to the `stable` branch of the documentation instead of
`latest`, since it lacks the version warning at the top.