Fix date display on deployed site

Move customized li.html template from theme submodule to project layouts.
This ensures dates appear to the left of post titles in both local and
deployed versions.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: maxfierrog

layouts/_default/li.html

@@ -0,0 +1,5 @@
+<li>
+    <a href="{{ .Permalink }}">
+        <small style="display: inline-block; width: 7em;"><time>{{ .Date | time.Format (i18n "posts.date") }}</time></small>{{ .Title }}
+    </a>
+</li>