[Syntax Higlight] handle variable as HTML tag

[jimblue]

Which Antlers Toolbox products are you requesting a feature for?

• [X] Antlers Toolbox for VS Code
• [ ] Antlers Toolbox for VS Code Formatter
• [ ] Formatter CLI
• [ ] Antlers Prettier Plugin
• [ ] Antlers Syntax Highlighting (external systems - not VS Code)

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Sometimes, it's necessary to use a different HTML tag depending on the context. For exemple, the following card component, could have a card_html_tag that is a div or an article:

<{{ card_html_tag }} class="card">
    <h2>Card Title</h2>
</{{ card_html_tag }}>

But for now, this break the syntax highlight: