Fixed toolbar

[cloverich]

I attempted to do this in #103 but realized, it should already be doing this based on my Toolbar file:

export const FixedToolbar = withCn(
  Toolbar,
  "supports-backdrop-blur:bg-background/60 sticky left-0 top-[57px] z-50 w-full overflow-x-auto rounded-t-lg border-b border-b-border bg-background/95 backdrop-blur",
);

Most of those classes, including sticky, are not making it to the final build. If I manually add them after, they have no effect. I suspect the associated tailwind classes are not making it into the final product. Since I'm already digging into many things in the other toolbar improvements, IMO makes sense to defer this to when I re-evaluate and adjust all styles in the design sprint. Next steps, I'd look at:

• How tailwind pre-processor is setup
• How cn and withCn work
• Whether radix components are playing a role
• Whether other CSS packages I have are playing a role (emotion?)