Fix for having comments and text as root items

[berendkleinhaneveld]

Problem was an AttributeError:

Error formatting ./file.cgx: 'Comment' object has no attribute 'end'
Traceback (most recent call last):
  File "./.venv/lib/python3.13/site-packages/ruff_cgx/formatter.py", line 124, in format_cgx_content
    format_template(node) for node in parsed.template_nodes
    ~~~~~~~~~~~~~~~^^^^^^
  File "./.venv/lib/python3.13/site-packages/ruff_cgx/template_formatter.py", line 246, in format_template
    start, end = template_node.location[0] - 1, template_node.end[0]
                                                ^^^^^^^^^^^^^^^^^
AttributeError: 'Comment' object has no attribute 'end'