gh-config: add page

[TheLastGimbus]

• The page (if new), does not already exist in the repo.
• The page is in the correct platform directory (common/, linux/, etc.)
• The page has 8 or fewer examples.
• The PR title conforms to the recommended templates.
• The page follows the content guidelines.
• The page description includes a link to documentation or a homepage (if applicable).

Add a new page for gh config

I could not figure out what does --host option do - neither does it say anywhere in the official documentation. If someone ever knew, it would be nice to fill that

Ref: #4701

[navarroaxel]

Thanks @TheLastGimbus, I left some comments.

[owenvoke]

LGTM, but I'm just wondering if it'd be worth adding two examples to the top for generic get/set to cover any future additional config properties. i.e.

- Get a specific configuration value:

`gh config get {{key}}`

- Set a specific configuration value:

`gh config set {{key}} {{value}}`

Also, I can't find the --host option that was mentioned, so not sure what that is. 🤷🏻

[TheLastGimbus]

I added set example - get is obvious to figure out from it

Also, I can't find the --host option

When you type gh config set --help - -h, --host string Set per-host setting - I tried if it's about repo-specific, but couldn't get it to work - it's probably for different Enterprise hosts 🤷

[owenvoke]

LGTM! Ah, yeah. I'd assume that's for per-Enterprise settings. 👍🏻 We can probably exclude that though for now.

[TheLastGimbus]

Hey, so, can someone merge this? @owenvoke? Everything is approved soo...

[sbrl]

Thanks, @TheLastGimbus!

[owenvoke]

Sorry, I was planning on merging but forgot to after I'd approved it. Thanks @TheLastGimbus 👍🏻