Changes to theme for book module

Timer

Please see screenshot.

If a template isn't practical for the links, we need

<a href="/node/add/book?parent=38">Add child page</a>

to be

<a class="btn btn-light" href="/node/add/book?parent=38"><i class="fa-solid fa-print"></i> Add child page</a>

and

<a href="/node/add/book?parent=38">Add child page</a>

should be

<a class="btn btn-success"> href="/node/add/book?parent=38">Add child page <i class="fa-solid fa-plus"></i></a>

Remove sidebar from home page of a book, these links are available at the bottom of the page.