this seems significantly less noisy and generally easier to scan

the implementation could likely be improved WRT elegance and efficiency

while syntactically this might look more complicated, it's actually more
explicit and thus easier to understand (less context required)

this also resulted in a `Page` rewrite

TDD FTW!

the primary purpose here was to make URIs configurable (i.e. customizing
mount points, avoiding hard-coded expectations), but this is also useful
for encapsulation and generally tying things together (notably managing
page hierarchies, but eventually also dispatching rendering)

NB: this does not yet include HTML generation and also omits both site
    metadata (which currently resides in `faucet.config.js`) and
    complate support

note that because HTML rendering is still missing, this isn't actually
usable yet

Use an NPM package for it, because the standard library doesn't offer
anything for that...

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