🔇 fix: Hide Button Icons from Screen Readers (#10776)

If you've got a screen reader that is reading out the whole page,
each icon button (i.e., `<button><SVG></button>`) will have both
the button's aria-label read out as well as the title from the
SVG (which is usually just "image").

Since we are pretty good about setting aria-labels, we should instead
use `aria-hidden="true"` on these images, since they are not useful
to be read out.

I don't consider this a comprehensive review of all icons in the app,
but I knocked out all the low hanging fruit in this commit.

packages/client/src/svgs/MCPIcon.tsx

@@ -7,6 +7,7 @@ export default function MCPIcon({ className }: { className?: string }) {
       fill="none"
       xmlns="http://www.w3.org/2000/svg"
       className={className}
+      aria-hidden="true"
     >
       <path
         d="M25 97.8528L92.8823 29.9706C102.255 20.598 117.451 20.598 126.823 29.9706V29.9706C136.196 39.3431 136.196 54.5391 126.823 63.9117L75.5581 115.177"