feat(snippets): variable snippet prefix and filename prefix

snippets/mint_system.web.internal_layout.replace_header.xml

@@ -0,0 +1,15 @@
+<data inherit_id="web.internal_layout" priority="50">
+    <xpath expr="//div[@class='header']" position="replace">
+        <div class="header">
+            <div class="row">
+                <div class="col-4">
+                </div>
+                <div class="col-4 text-center">
+                </div>
+                <div class="col-4 text-right">
+                    <img t-if="company.logo" t-att-src="image_data_uri(company.logo)" alt="Logo" style="height:61px; margin-right: 40px;"/>
+                </div>
+            </div>
+        </div>
+    </xpath>
+</data>