feat: add a new setting logo_link

[blahetal]

Hi, I added a new config logo_link which when set wraps the logo in the top left corner in an anchor/link. The link can be set to another page or to a page in cms giving you a quick access to your fav page (it is like a home button which will transfer to your index page).

In the next major version, it would be good to group logo_url and logo_link in one object/setting, like logo: { url: "...", link: "..." }.

[netlify[bot]]

✅ Deploy Preview for demo-staticjscms ready!

Name	Link
🔨 Latest commit	9b155a9e9c5bf43b0aeed61c7e66bcd596807970
🔍 Latest deploy log	https://app.netlify.com/sites/demo-staticjscms/deploys/65aa7e50f3335b0008f2101b
😎 Deploy Preview	https://deploy-preview-1070.demo.staticcms.org
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[netlify[bot]]

✅ Deploy Preview for staticjscms ready!

Name	Link
🔨 Latest commit	9b155a9e9c5bf43b0aeed61c7e66bcd596807970
🔍 Latest deploy log	https://app.netlify.com/sites/staticjscms/deploys/65aa7e504815bf0008417763
😎 Deploy Preview	https://deploy-preview-1070.staticcms.org
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (32684a0) 55.87% compared to head (9b155a9) 55.87%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1070 +/- ## ======================================= Coverage 55.87% 55.87% ======================================= Files 259 259 Lines 12314 12314 Branches 3089 3089 ======================================= Hits 6880 6880 Misses 5027 5027 Partials 407 407 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.