🔇 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.

client/src/components/Endpoints/Settings/Examples.tsx

@@ -81,14 +81,14 @@ function Examples({ readonly, examples, setExample, addExample, removeExample }:
           className="mr-2 mt-1 h-auto items-center justify-center bg-transparent px-3 py-2 text-xs font-medium font-normal text-black hover:bg-gray-100 hover:text-black focus:ring-0 focus:ring-offset-0 dark:bg-transparent dark:text-white dark:hover:bg-gray-700 dark:hover:text-white dark:focus:outline-none dark:focus:ring-offset-0"
           onClick={removeExample}
         >
-          <Minus className="w-[16px]" />
+          <Minus className="w-[16px]" aria-hidden="true" />
         </Button>
         <Button
           type="button"
           className="mt-1 h-auto items-center justify-center bg-transparent px-3 py-2 text-xs font-medium font-normal text-black hover:bg-gray-100 hover:text-black focus:ring-0 focus:ring-offset-0 dark:bg-transparent dark:text-white dark:hover:bg-gray-700 dark:hover:text-white dark:focus:outline-none dark:focus:ring-offset-0"
           onClick={addExample}
         >
-          <Plus className="w-[16px]" />
+          <Plus className="w-[16px]" aria-hidden="true" />
         </Button>
       </div>
     </>