feat(sitemap): resolve and link redirect targets in the route listing

[eddieferrer]

What

The Redirects section of /ui-site-map bound each route's redirect straight to
<router-link>'s to. vue-router also allows redirect to be a function, which
isn't a valid to — so /lend/:category (routes.js:221) warned about an
invalid prop and rendered the function's own source as its link text.

You can see this here: https://www.development.kiva.org/ui-site-map particularly the redirect section below.

Redirect rows now resolve like the prod/dev rows above them, with param inputs
for /lend/:category, /lend-beta/:id and /funded/:id. A typed param flows
into both sides of the row:

lend/:category   → /lend-by-category/:category
lend/agriculture → /lend-by-category/agriculture
lend-beta/2468   → /lend/2468

How the dynamic target resolves

parseFunctionRedirect reads the function's source, taking the first path-like
literal and rewriting ${to.params.x} to :x. It's pattern-based rather than
special-cased, so future dynamic redirects work too, falling back to
(dynamic redirect) when the source isn't readable.

Two deliberate constraints:

• The function is never called. It assigns window.location.href in the
  browser and throws on the server, so calling it to preview the target would
  navigate off the sitemap page.
• The target is a plain <a href>, not a <router-link>.
  /lend-by-category is served externally and has no route, so router-link
  would warn No match found for location.

[kiva-robot]

🎉 This PR is included in version 3.81.0-rc.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[kiva-robot]

🎉 This PR is included in version 3.81.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀