Support prettier-ignore-start / prettier-ignore-end in Liquid templates

Is your feature request related to a problem? Please describe.
Currently, @shopify/prettier-plugin-liquid does not support prettier-ignore-start / prettier-ignore-end for range-based ignores. Only node-level {% # prettier-ignore %} comments are supported.
This makes it cumbersome to preserve intentional formatting or whitespace across larger sections of Liquid templates.

Describe the solution you'd like
Support standard Prettier range ignore comments:

<!-- prettier-ignore-start -->
<div class="custom-layout">
  {{ some_variable | complicated_filter: foo: bar }}
  {% render 'component', foo: bar %}
</div>
<!-- prettier-ignore-end -->

or

{% comment %} prettier-ignore-start {% endcomment %}
<div class="custom-layout">
  {{ some_variable | complicated_filter: foo: bar }}
  {% render 'component', foo: bar %}
</div>
{% comment %} prettier-ignore-end {% endcomment %}

Describe alternatives you've considered

• Using {% # prettier-ignore %} before every node — works but is verbose and noisy.
• Disabling formatting for the entire file via .prettierignore — too coarse-grained.

Checklist

• I have checked and made sure that the proposal adheres to this plugin's principles

Start in packages/prettier-plugin-liquid and review the plugin principles at docs/prettier-plugin-liquid/principles/index.md. Determine how the existing node-level {% # prettier-ignore %} handling works, then support the HTML-comment and Liquid-comment range forms so formatting is preserved between the start and end markers.