docs: removed footer text from template

I really disliked how it said "build by XYZ using ABC template" I just thought
it would look cleaner if it was not there at all.

Author: Tygo-van-den-Hurk

docs/overrides/templates/footer.html

@@ -0,0 +1,9 @@
+<footer view-transition-name="footer"
+    class="group-has-[.section-soft]/body:bg-surface/40 3xl:fixed:bg-transparent dark:bg-transparent">
+    <div class="container-wrapper px-4 xl:px-6">
+        <div class="flex h-(--footer-height) items-center justify-between">
+            <div class="text-muted-foreground w-full text-center text-xs leading-loose sm:text-sm">
+            </div>
+        </div>
+    </div>
+</footer>