Cannot capture full urls as params

Hey there, thanks for this cool library :)

I'm writing an application that needs to capture params that are paths. Is it possible to do it?

Example

```rust
router.add(
"/delete/:path",
DeleteFileScreen
);
```

Then I'd like to match something like this:

```rust
match router.recognize("/delete/home/user/example/foo/bar")
```
Essentially I would like something like Flask's PATH url converter: https://flask.palletsprojects.com/en/2.0.x/quickstart/#variable-rules.

Thank you

Start at the router.add and router.recognize entry points shown in the issue, and trace how dynamic URL segments are matched. Confirm the intended behavior using the /delete/:path example, including paths with multiple slash-separated segments. Done means recognizing /delete/home/user/example/foo/bar and exposing the captured path parameter.

Written by the indexing model from the issue text.