Add regex capabilities to redirects

[edlefebvre]

Prerequisites

• [x] I am running the latest version. (up upgrade)
• [x] I searched to see if the issue already exists.
• [x] I inspected the verbose debug output with the -v, --verbose flag.
• [ ] Are you an Up Pro subscriber?

Description

It would be great to add regex capabilities to redirects like so:

redirects: {
  "/folder/:slug(regexhere)": {
    "location": "https://.../:slug",
    "status": 301
  }
}