Latest Zmpl provides `template.renderWithLayout(other_template, data)`,
allowing a template to be renedered within another template.
Create layouts in `src/app/views/layouts/` or use
`jetzig generate layout [name]` and set `pub const layout = "name";` in
each view file.
Runs a development server and auto-reloads when changes are detected to
files.
Note that a "change" is just an mtime update, Zig does a more
intelligent change detection so avoids unnecessary recompiles, so the
server reloads very quickly.
