Closes #14735: Implement django-htmx (#14873)

* Install django-htmx

* Replace is_htmx() function with request.htmx

* Remove is_embedded() HTMX utility

* Include django-htmx debug error handler

netbox/utilities/htmx.py

@@ -1,24 +0,0 @@
-from urllib.parse import urlparse
-
-__all__ = (
-    'is_embedded',
-    'is_htmx',
-)
-
-
-def is_htmx(request):
-    """
-    Returns True if the request was made by HTMX; False otherwise.
-    """
-    return 'Hx-Request' in request.headers
-
-
-def is_embedded(request):
-    """
-    Returns True if the request indicates that it originates from a URL different from
-    the path being requested.
-    """
-    hx_current_url = request.headers.get('HX-Current-URL', None)
-    if not hx_current_url:
-        return False
-    return request.path != urlparse(hx_current_url).path