* Add SQL query executor

* Move mermaid.min.js to static asset
* Create templates for sql logic

templates/sql_explorer.html

@@ -0,0 +1,18 @@
+{% extends 'base.html' %}
+
+{% block content %}
+
+<div class="bg-white shadow rounded-lg p-4 sm:p-6 xl:p-8 mb-8">
+    <div class="mb-4 flex items-center justify-between">
+        <div>
+            <h3 class="text-xl font-bold text-gray-900 mb-2">SQL Explorer</h3>
+        </div>
+    </div>
+
+    <div hx-get="{{ url_for('sql_schema') }}" hx-trigger="load"></div>
+
+    {{ render_partial('partials/sql_explorer/sql_query.html') }}
+
+</div>
+
+{% endblock %}