When `HX-Target` header is present, bypass any configured layout for the
request. This allows a full page reload to render with a layout, i.e.
render the entire page, while a request from htmx will load just the
content directly generated by the view.
Latest Zig nightly now hits a panic, probably we have a cyclic reference
in the tree. We should fix this ASAP otherwise we risk adding tests
without running them, but for now this should get builds passing again
with latest Zig.
Implement `jetzig.http.Request.params()` which parses either a JSON
request body or a query param string into a `jetzig.data.Value`.
Allow configuring params for static site generation - configure an array
of params for each endpoint which is then parsed at build time and a
separate JSON and HTML output is generated for each by invoking the
relevant view function and passing in resource ID/params. Params are
stored in generated `routes.zig` for route matching at run time.
