Add support for HTMX 4.0

[Lanayx]

Hello, thank you so much for supporting this extension. Would you be able to update it for Htmx4? According to bigskysoftware/htmx#1911 (comment) it will be not supported natively and will still require being an extension

[douglasduteil]

it will be not supported natively and will still require being an extension

That sad...