cache edit pages for librarians when on view page

[RayBB]

With this PR we will prefetch (cache) the edit page of authors/works/editions so when you click the edit button it should load nearly instantly.

Contributes to #9121

How it works:

• Visit an author page
• In the background, the edit page is automatically loaded (on page load and then on subsequent page focuses)
• When you click the edit button it should load instantly from the cache.

Technical

• We can't just load on focus because the focus event doesn't trigger if you just click a link normally

Testing

Side by side comparison of prod (no precache) vs testing (with precache). Button turns red when clicked.
Can you tell which is which?

trimmed_red_timer.mp4

Longer video showing not whole process

https://github.com/internetarchive/openlibrary/assets/921217/3a9125a6-ba6d-49fe-a2ea-50642e67d727

Script used to click two buttons at once:

function executeAtTopOfMinute() {
  const now = new Date();
  // Calculate the time difference to the top of the minute
  const targetTime = new Date(now.getFullYear(), now.getMonth(), now.getDate(), now.getHours(), now.getMinutes()+1, 0);
  const timeDifference = targetTime - now;
  // Execute the action after the calculated time difference
  setTimeout(() => {
                // turn button red and then click it
                document.querySelector('.editButton a').style = "background-color:red" 
		document.querySelector('.editButton a').click();
  }, timeDifference);
}

// Call the function to schedule the action
executeAtTopOfMinute();

Screenshot

No UI changes.

Stakeholders

[RayBB]

This editButton class is on the "Cancel" button.
It has almost no effect, (other than a light aligning) and complicates detecting when to fetch the edit button.
So I just removed it.