Feature Request: URL Construction Utility with Dynamic Path and Query Parameters

**Is your feature request related to a problem? Please describe.**

Currently, there is no utility in the `jsr:@std` repo that simplifies the construction of URLs with dynamic path parameters and query strings. For example, something that can easily handle creating URLs like:

```js
urlcat("/path/:id", { id: 1, limit: 10 }); // Output: /path/1?limit=10
```

Additionally, there's no convenient way to update `searchParams` for a URL dynamically, which is something I'd like to handle more efficiently.

**Describe the solution you'd like**

I'd like to have a utility similar to `urlcat` that:
- Allows for constructing URLs with dynamic path parameters and query strings.
- Supports easy alteration of `searchParams` on demand. For example:

```js
urlcat(new URL(request.url), { offset: 10, limit: 10 });
```

Where if `request.url` is `/path/1?offset=0&limit=10`, it will update the `searchParams` to output:

```
/path/1?offset=10&limit=10
```

**Describe alternatives you've considered**

1. Using existing packages like `urlcat`, but integrating a more native solution into the repo would streamline and reduce dependencies.
2. Manually updating `searchParams`, though this can get verbose and repetitive for common use cases.