feat: add support for hx-target-* attribute

[a-h]

Discussed in #269

^{Originally posted by koddr November 1, 2023}
Hi,

First, let me thank you for this amazing tool that allows you to develop the Go web applications very quickly! Love it 😘

I noticed that the plugin for VSCode does not full support the htmx extension response-targets:

It would be really cool if you could add wildcard support.

Right now, you have to define each hx-target like this:

<form
 	hx-post="/api/secret/unlock"
 	hx-target="#secret"
 	hx-target-400="#errors"
 	hx-target-403="#errors"
 	hx-target-404="#errors"
 	hx-target-500="#errors"
 	hx-target-502="#errors"
 	hx-target-503="#errors"
 	hx-indicator="#loading-indicator"
>
...

Although it could be simplified to:

<form
 	hx-post="/api/secret/unlock"
 	hx-target="#secret"
 	hx-target-*="#errors"
 	hx-indicator="#loading-indicator"
>
...

Thanks for your time and templ library! 😊

[a-h]

See #269 (comment) for implementation instructions.