fix(rhema-code): indent list items' paragraphs in the transcript

The markdown renderer tracked list depth only to pick a marker. A
paragraph that follows a blank row inside an item started at column 0,
so a tool's catalog lines and its "Where it runs" paragraph read as
text after the list rather than part of the bullet. `rhema system show`
previews the prompt through this renderer, which is where it showed.

An item now records its content column, marker width included, and a
row the renderer starts inside one is padded to it. The paragraph that
introduces a sublist keeps it attached: the blank row the paragraph
asks for at its end is taken back, the hug a sublist already got when
no lead-in preceded it.

The tool sections put a blank row between the row and its description
so the description is a paragraph of the item — the shape the indent
applies to, where a soft break would have joined it to the schema.

crates/rhema-claw/SYSTEM.md

@@ -24,6 +24,7 @@ what it is for. The arguments are the JSON schema a call must satisfy.
 
 {% for tool in tools %}
 - {{ tool.name }} | {{ tool.parameters | json }}
+
 {{ tool.description | indent(2, true) }}
 {% endfor %}
 {% endif %}