Using redirects to make pretty API URLs

We want our API to be accessible on the `/api/pokemon` route, so in `netlify.toml` we can add a rewrite, which is different than a redirect.

A redirect will change the url in the browser, while a rewrite will not. So the user will still see `/api/pokemon/:slug` instead of seeing the URL change to `/.netlify/functions/pokemon`. We specifically need to use the `200` status code to get a rewrite.

We can put the rewrite in the `netlify.toml` under the `redirects` key. Netlify allows us to specify a `from` url, a `to` url, the status code, and more if we wanted

```bash
[[redirects]]
from = "/api/pokemon/:slug"
to = "/.netlify/functions/pokemon"
status = 200
```

Now redeploy and we can use our new URL

netlify.toml

@@ -7,4 +7,9 @@ mkdir functions &&
 cargo build --release --bin pokemon-api &&
 cp target/release/pokemon-api functions/
 """
-publish = "crates"
+publish = "crates"
+
+[[redirects]]
+from = "/api/pokemon/:slug"
+to = "/.netlify/functions/pokemon"
+status = 200