Set A Specific URL For A Page In Hugo

Use `url` in the frontmatter to set a URL regardless of where it is in the file structure.

For example, if you have a file with the path:

content/storage/2020/alpha.md

With the front matter:

title: Example File Move url: /omega ---

It will end up at:

https://www.example.com/omega/

Note that it must start with a `/`.

TKTKTK: Figure out if trailing slash mattersi