fix(head): expose frontmatter into runtime head

[voluntadpear]

trafficstars

fixes #1762

What is it?

• [ ] Feature / enhancement
• [x] Bug
• [ ] Docs / tests

Description

The additional frontmatter attributes weren't correctly propagated to the head context used in the Qwick city runtime.

This PR adds the missing propagation of the frontmatter property that was generated during buildtime to the runtime.

Use cases and why

When using the useDocumentHead from markdown routes, additional attributes found in the frontmatter should be correctly exposed into the frontmatter property.

Checklist:

• [x] My code follows the developer guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation
• [ ] Added new tests to cover the fix / functionality

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[adamdbradley]

Great fix, thanks!

[ahmadalfy]

@adamdbradley this wasn't released yet right? I checked the changelog and it wasn't there.

[HeyITGuyFixIt]

@ahmadalfy Looks like it is in v0.12.0.