feat: autoconfval now supports multiple lines default value

Author: SilverRainZ

src/sphinxnotes/project/templates/autoconfval.rst

@@ -1,11 +1,23 @@
 {% set opt = load_extra('env').config.values[name] %}
+{% set default = opt.default | string %}
 
 .. role:: py(code)
    :language: Python
 
 .. confval:: {{ name }}
    :type: {{ opt.valid_types | autoconfval_types | join(', ') }}
-   :default: :py:`{{ opt.default | pprint }}`
+   {% if '\n' not in default %}:default: :py:`{{ opt.default | pprint }}`{% endif %}
+
+   ..
+
+   {% if '\n' in default %}
+   :default:
+      .. code-block::
+
+         {% for _line in default.split('\n') -%}
+         {{ _line }}
+         {% endfor %}
+   {% endif %}
 
    {%- for line in opt.description.split('\n') %}
    {{ line }}