fix: full width ai bubble menu

[redac]

Apparently, Tippy's maxWidth is set to 350px by default...

However, changing that option alone doesn't give it full width. I had to directly target the tippy-2 element to get this to work. (see #30)

Note: was looking at Notion's menu and i think that constraining the menu to be inside the text editor would be better. For reference: