Allow @HxRequest to be ignored for boosted requests

[wimdeblauwe]

We currently have 2 endpoints, one for the hx requests and one for a full page load.

@GetMapping("/{id}")
public String detail(@PathVariable Long id, Model model) {
}

@HxRequest
@GetMapping("/{id}")
public HtmxResponse hxDetail(@PathVariable Long id, Model model) {
}

Now, if we use hx-boost=true, the endpoint for the hx-requests is used per default.

However the purpose of hx-boost is IMHO to trigger a full page load request and let htmx handle it differently on the frontend.

We are aware of htmxRequest.isBoosted() but we think it would be much more useful to allow to ignore boosted optionally, so the full page load can be used.

@HxRequest(ignore_boosted=true) 

We would suggest to set the default to false for backwards compatibility.

Originally posted by @resmo in #138