Improve client-side-templates Extension to Handle Mustache Partials

[dlemaignent]

Description

This pull request enhances the client-side-templates extension for HTMX by addressing an issue with Mustache partials in strict HTML contexts, such as elements in tables. Due to HTML parsing rules, Mustache expressions must often be wrapped in comment tags () to ensure valid HTML. This update automatically removes those comment tags after rendering, simplifying the integration of Mustache partials.

Htmx version:
2.0.2

Changes
New Behavior:

Automatically strips HTML comment tags () from rendered content while preserving the Mustache-generated output.
Provides seamless support for Mustache partials within strict HTML elements like .

Testing

<template id="table-template">
    <table>
        <thead>
            <tr>
                <th>Column 1</th>
                <th>Column 2</th>
            </tr>
        </thead>
        <tbody>
            <!-- {{#items}} -->
                <!-- {{> row-template}} -->
            <!-- {{/items}} -->
        </tbody>
    </table>
</template>

<template id="row-template">
    <tr>
        <td>{{value1}}</td>
        <td>{{value2}}</td>
    </tr>
</template>

<div 
    id="table-container"
    hx-get="/api/data"
    hx-trigger="load"
    hx-target="#table-container"
    hx-swap="innerHTML"
    hx-ext="client-side-templates-hal"
    mustache-hal-template="table-template">
</div>

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