feat: add template file

Signed-off-by: kjuulh <contact@kjuulh.io>

cuddle-leptos/cuddle-template.json

@@ -0,0 +1,9 @@
+{
+  "templating": "tera",
+  "delimiter": "[[]]",
+  "prompt": {
+    "name": {
+      "description": "Project name"
+    }
+  }
+}